The Washington–Baltimore combined metropolitan statistical area is a statistical area, including the overlapping metropolitan areas of

Washington, D.C. Washington, D.C., formally the District of Columbia and commonly known as Washington or D.C., is the capital city and federal district of the United States. The city is on the Potomac River, across from Virginia, and shares land borders with ...

and

Baltimore Baltimore is the most populous city in the U.S. state of Maryland. With a population of 585,708 at the 2020 census and estimated at 568,271 in 2024, it is the 30th-most populous U.S. city. The Baltimore metropolitan area is the 20th-large ...

. The region includes Central

Maryland Maryland ( ) is a U.S. state, state in the Mid-Atlantic (United States), Mid-Atlantic region of the United States. It borders the states of Virginia to its south, West Virginia to its west, Pennsylvania to its north, and Delaware to its east ...

Northern Virginia Northern Virginia, locally referred to as NOVA or NoVA, comprises several County (United States), counties and independent city (United States), independent cities in the Commonwealth (U.S. state), Commonwealth of Virginia in the United States. ...

, three counties in the Eastern Panhandle of West Virginia, and one county in south-central

Pennsylvania Pennsylvania, officially the Commonwealth of Pennsylvania, is a U.S. state, state spanning the Mid-Atlantic (United States), Mid-Atlantic, Northeastern United States, Northeastern, Appalachian, and Great Lakes region, Great Lakes regions o ...

. It is the most educated, highest-income, and third-most populous combined statistical area in the United States behind New York City–Newark, NJ and Los Angeles–Long Beach. The area is designated by the

Office of Management and Budget The Office of Management and Budget (OMB) is the largest office within the Executive Office of the President of the United States (EOP). The office's most prominent function is to produce the president's budget, while it also examines agency pro ...

(OMB) as the Washington–Baltimore–Arlington, DC–MD–VA–WV–PA Combined Statistical Area. It is composed primarily of two major metropolitan statistical areas (MSAs), the Washington–Arlington–Alexandria, DC–VA–MD–WV MSA and the Baltimore–Columbia–Towson, Maryland Metropolitan Statistical Area. Five smaller urban areas not contiguous to the main urban area but having strong commuting ties with the main area are included in the metropolitan area:"OMB BULLETIN NO. 18-04: Revised Delineations of Metropolitan Statistical Areas, Micropolitan Statistical Areas, and Combined Statistical Areas, and Guidance on Uses of the Delineations of These Areas"
Office of Management and Budget. September 14, 2018. Hagerstown–Martinsburg, Maryland–West Virginia MSA, the Chambersburg–Waynesboro, Pennsylvania MSA, the Winchester, VA–WV MSA, the California–Lexington Park, Maryland MSA, and the Easton, Maryland micropolitan statistical area (μSA). Some counties, such as Caroline and

King George County, Virginia King George County is a county located in the Commonwealth of Virginia. As of the 2020 census, the population sits at 26,723. Its county seat is the census designated place of King George. The county's largest employer is the U.S. Naval S ...

, are not officially designated by OMB as members of this metropolitan area but still consider themselves members anyway. This is mostly due to their proximity to the area, the size of their commuter population, and by the influence of local broadcasting stations. The population of the entire Washington–Baltimore Combined Statistical Area as of the 2020 census was 9,973,383. The area's most-populous city is Washington, D.C. with a population of 689,545, and the area's most populous county is

Fairfax County, Virginia Fairfax County, officially the County of Fairfax, is a County (United States), county in the Commonwealth (U.S. state), Commonwealth of Virginia. With a population of 1,150,309 as of the 2020 United States census, 2020 census, it is the most p ...

, with a population of 1,150,309.

Components of the combined statistical area

The counties and independent cities and their groupings that comprise the area are listed below with their 2012 population estimates. Central counties/cities (designated as such by OMB) for each MSA are shown in italics. * Washington–Arlington–Alexandria, DC–VA–MD–WV Metropolitan Area (5,860,342)
** Arlington–Alexandria–Reston, VA–WV Metropolitan Division *** ''

Arlington County, Virginia Arlington County, or simply Arlington, is a County (United States), county in the U.S. state of Virginia. The county is located in Northern Virginia on the southwestern bank of the Potomac River directly across from Washington, D.C., the nati ...

'' ***

Clarke County, Virginia Clarke County is a County (United States), county in the Virginia, Commonwealth of Virginia. As of the 2020 United States census, 2020 census, the population was 14,783. Its county seat is Berryville, Virginia, Berryville. Clarke County is inc ...

***

Culpeper County, Virginia Culpeper County is a county located along the borderlands of the northern and central region of the Commonwealth of Virginia. As of the 2020 United States census, the population was 52,552. Its county seat and only incorporated community is ...

*** ''

'' ***

Fauquier County, Virginia Fauquier County is a county (United States), county in the Commonwealth (U.S. state), Commonwealth of Virginia. As of the 2020 United States census, 2020 census, the population was 72,972. The county seat is Warrenton, Virginia, Warrenton. Fa ...

*** ''

Loudoun County, Virginia Loudoun County () is in the northern part of the Commonwealth of Virginia in the United States. In 2020, the census returned a population of 420,959, making it Virginia's third-most populous county. The county seat is Leesburg. Loudoun County ...

'' *** ''

Prince William County, Virginia Prince William County lies beside the Potomac River in the Commonwealth of Virginia. At the 2020 census, the population was 482,204, making it Virginia's second most populous county. The county seat is the independent city of Manassas. A part ...

'' ***

Rappahannock County, Virginia Rappahannock County is a county (United States), county located in the northern Piedmont region of the Commonwealth (U.S. state), Commonwealth of Virginia, US, adjacent to Shenandoah National Park. As of the 2020 Census, the population was 7,3 ...

***

Spotsylvania County, Virginia Spotsylvania County is a county (United States), county in the Commonwealth of Virginia. It is a suburb approximately 60 miles (90km) south of D.C. It is a part of the Northern Virginia region and the D.C. area. As of 2024, Spotsylvania County ...

*** ''

Stafford County, Virginia Stafford County is a county located in the Commonwealth of Virginia. It is approximately south of Washington, D.C. It is part of the Northern Virginia region, and the D.C area. It is one of the fastest-growing and highest-income counties in ...

'' ***

Warren County, Virginia Warren County is a U.S. county located in the Commonwealth of Virginia. The 2020 United States census places Warren County within the Washington-Arlington-Alexandria, DC-VA-MD-WV Metropolitan Statistical Area with a population of 40,727. Th ...

*** ''

Alexandria, Virginia Alexandria is an independent city (United States), independent city in Northern Virginia, United States. It lies on the western bank of the Potomac River approximately south of Washington, D.C., D.C. The city's population of 159,467 at the 2020 ...

'' *** ''

Fairfax, Virginia Fairfax ( ) is an independent city (United States), independent city in Virginia and the county seat of Fairfax County, Virginia, in the United States. As of the 2020 United States census, 2020 census, the population was 24,146. Fairfax is pa ...

'' *** ''

Falls Church, Virginia Falls Church City is an independent city (United States), independent city in the Commonwealth (U.S. state), Commonwealth of Virginia, United States. As of the 2020 United States census, 2020 census, the population was 14,658. Falls Church is ...

'' ***

Fredericksburg, Virginia Fredericksburg is an Independent city (United States), independent city in Virginia, United States. As of the 2020 United States census, 2020 census, the population was 27,982. It is south of Washington, D.C., and north of Richmond, Virginia, R ...

*** ''

Manassas, Virginia Manassas (), formerly Manassas Junction, is an independent city (United States), independent city in the Commonwealth (U.S. state), Commonwealth of Virginia, United States. The population was 42,772 at the 2020 Census. It is the county seat of ...

'' *** '' Manassas Park, Virginia'' ***

Jefferson County, West Virginia Jefferson County is the easternmost county in the U.S. state of West Virginia. It is located in the Shenandoah Valley in the Eastern Panhandle of West Virginia. As of the 2020 census, the population was 57,701. Its county seat is Charles T ...

** Frederick–Gaithersburg–Bethesda, MD Metropolitan Division (1,244,291) ***

Frederick County, Maryland Frederick County is located in Maryland, United States. As of the 2020 United States census, 2020 U.S. census, the population was 271,717. The county seat is Frederick, Maryland, Frederick. The county is part of the Washington metropolitan area, ...

*** ''

Montgomery County, Maryland Montgomery County is the most populous County (United States), county in the U.S. state of Maryland. As of the 2020 United States census, the county's population was 1,062,061, increasing by 9.3% from 2010. The county seat is Rockville, Maryland ...

'' ** Washington, DC–MD Metropolitan Division (4,616,051) *** ''

Washington, District of Columbia Washington, D.C., formally the District of Columbia and commonly known as Washington or D.C., is the capital city and Federal district of the United States, federal district of the United States. The city is on the Potomac River, across from ...

'' ***

Charles County, Maryland Charles County is a county located in the U.S. state of Maryland. As of the 2020 United States census, the population was 166,617. The county seat is La Plata. The county was named for Charles Calvert (1637–1715), third Baron Baltimore. T ...

*** ''

Prince George's County, Maryland Prince George's County (often shortened to PG County or PG) is located in the U.S. state of Maryland bordering the eastern portion of Washington, D.C. As of the 2020 United States census, 2020 U.S. census, the population was 967,201, making it ...

'' * Baltimore–Columbia–Towson, MD Metropolitan Area (2,753,149)
** '' Baltimore City'' ** ''

Anne Arundel County Anne Arundel County (; ), also notated as AA or A.A. County, is located in the U.S. state of Maryland. As of the 2020 United States census, its population was 588,261, an increase of just under 10% since 2010. Its county seat is Annapolis, wh ...

'' ** '' Baltimore County'' ** Carroll County ** Harford County ** '' Howard County'' ** '' Queen Anne's County'' * Hagerstown–Martinsburg, MD–WV Metropolitan Area (256,278) ** ''

Washington County, Maryland Washington County is a County (United States), county located in the U.S. state of Maryland. The population was 154,705 as of the 2020 United States census, 2020 census. Its county seat and largest city is Hagerstown, Maryland, Hagerstown. The ...

'' ** '' Berkeley County, West Virginia'' ** Morgan County, West Virginia * Chambersburg, PA Metropolitan Area (151,275) ** '' Franklin County, Pennsylvania'' * Winchester, VA–WV Metropolitan Area (130,907) ** '' Frederick County, Virginia'' ** '' Winchester city, Virginia'' **

Hampshire County, West Virginia Hampshire County is a List of counties in West Virginia, county in the U.S. state of West Virginia. As of the 2020 United States census, 2020 census, the population was 23,093. Its county seat is Romney, West Virginia, Romney, West Virginia's o ...

* California–Lexington Park, MD Metropolitan Area (108,987) ** ''

Calvert County Calvert County is a county located in the U.S. state of Maryland. As of the 2020 United States census, the population was 92,783. Its county seat is Prince Frederick. The county's name is derived from the family name of the Barons of Baltimo ...

'' ** '' St. Mary's County'' * Easton, MD Micropolitan Area (38,098) ** '' Talbot County, Maryland'' * Lake of the Woods, VA Micropolitan Area ** ''

Orange County, Virginia Orange County is a county (United States), county located in the central Piedmont region of Virginia, Piedmont region of the Commonwealth (U.S. state), Commonwealth of Virginia. At the 2020 United States census, 2020 census, the population was ...

'' * Cambridge, MD Micropolitan Area ** ''

Dorchester County, Maryland Dorchester County is a county located in the U.S. state of Maryland. At the 2020 census, the population was 32,531. Its county seat is Cambridge. The county was formed in 1669 and named for the Earl of Dorset, a family friend of the Calvert ...

Regional organizations

Metropolitan Washington Council of Governments

Founded in 1957, the

Metropolitan Washington Council of Governments Metropolitan Washington Council of Governments (MWCOG) is an independent, nonprofit association designed to address regional issues confronting Washington, D.C., suburban Maryland, and Northern Virginia. It was founded in 1957. MWCOG comprises 24 ...

(MWCOG) is a regional organization of 23 Washington-area local governments, members of the

and

Virginia Virginia, officially the Commonwealth of Virginia, is a U.S. state, state in the Southeastern United States, Southeastern and Mid-Atlantic (United States), Mid-Atlantic regions of the United States between the East Coast of the United States ...

state legislatures, the U.S. Senate, and the U.S. House of Representatives. MWCOG provides a forum for discussion and the development of regional responses to issues regarding the environment, transportation, public safety, homeland security, affordable housing, community planning, and economic development. The National Capital Region Transportation Planning Board, a component of MWCOG, is the federally designated

Metropolitan Planning Organization A metropolitan planning organization (MPO) is a federally mandated and federally funded transportation policy-making organization in the United States that is made up of representatives from local government and governmental transportation authorit ...

for the metropolitan Washington area.

Baltimore Metropolitan Council

The Baltimore Metropolitan Council is the equivalent organization for the Baltimore portion of the combined Baltimore–Washington metropolitan area. The BMC, which was created in 1992 as the successor to the Regional Planning Council and Baltimore Regional Council of Governments, consists of the Baltimore region's elected executives, representing Baltimore City and Anne Arundel, Baltimore, Carroll, Harford and Howard counties.About BMC – Baltimore Metropolitan Council
The Baltimore Regional Transportation Board is the federally recognized Metropolitan Planning Organization for transportation planning in the

region.

Principal cities

Major cities

, Maryland *

Baltimore area

* Aberdeen, Maryland *

Annapolis, Maryland Annapolis ( ) is the capital of the U.S. state of Maryland. It is the county seat of Anne Arundel County and its only incorporated city. Situated on the Chesapeake Bay at the mouth of the Severn River, south of Baltimore and about east ...

Arbutus, Maryland Arbutus is an unincorporated community and a census-designated place in Baltimore County, Maryland, United States. The population was 20,483 at the 2010 census. The census area also contains the communities of Halethorpe and Relay, in which all ...

* Bel Air, Maryland * Brooklyn, Maryland * Brooklyn Park, Maryland *

Catonsville, Maryland Catonsville () is a census-designated place (CDP) in Baltimore County, Maryland, Baltimore County, Maryland. The population was 44,701 at the 2020 United States census, 2020 US Census. The community is a streetcar suburb of Baltimore along the cit ...

Cockeysville, Maryland Cockeysville is a census-designated place (CDP) in Baltimore County, Maryland, United States. The population was 20,776 at the 2010 United States Census, 2010 census. History Cockeysville was named after the Cockey family who helped establish the ...

Columbia, Maryland Columbia is a planned community in Howard County, Maryland, United States, consisting of 10 self-contained villages. With a population of 104,681 at the 2020 United States census, 2020 census, it is the second-most-populous community in Maryland ...

* Curtis Bay, Maryland * Dundalk, Maryland * Eldersburg, Maryland * Elkridge, Maryland *

Ellicott City, Maryland Ellicott City is an Unincorporated area#United States, unincorporated community and census-designated place in, and the county seat of, Howard County, Maryland, Howard County, Maryland, United States. Part of the Baltimore metropolitan area, its ...

Essex, Maryland Essex is an Unincorporated area#United States, unincorporated community and census-designated place in Baltimore County, Maryland, Baltimore County, Maryland, United States. Essex history dates back to 1909. The population was 40,505 in the 2020 ...

* Fullerton, Maryland * Glen Burnie, Maryland * Halethorpe, Maryland * Linthicum, Maryland * Lutherville-Timonium, Maryland * Middle River, Maryland * North Laurel, Maryland * Owings Mills, Maryland * Overlea, Maryland * Parkville, Maryland * Pasadena, Maryland * Perry Hall, Maryland * Pikesville, Maryland *

Randallstown, Maryland Randallstown is an Unincorporated area#United States, unincorporated community and census-designated place in Baltimore County, Maryland, Baltimore County, Maryland, United States. It is named after Christopher and Thomas Randall, two 18th-centu ...

* Reisterstown, Maryland * Savage, Maryland * Severna Park, Maryland *

Towson, Maryland Towson () is an unincorporated community and a census-designated place in Baltimore County, Maryland, United States. The population was 59,533 in the 2020 census. It is the county seat of Baltimore County and the second-most populous unincorpo ...

Westminster, Maryland Westminster is a city in and the county seat of Carroll County, Maryland, United States. The city's population was 19,960 at the 2020 United States census, 2020 census. Westminster is an outlying community in the Baltimore metropolitan area, whic ...

* Woodlawn, Maryland

Washington, D.C. area

Bethesda, Maryland Bethesda () is an unincorporated, census-designated place in southern Montgomery County, Maryland, United States. Located just northwest of Washington, D.C., it is a major business and government center of the Washington metropolitan region ...

Bowie, Maryland Bowie () is a city in Prince George's County, Maryland, United States. Per the 2020 United States census, 2020 census, the population was 58,329. Bowie has grown from a small railroad stop to the largest municipality in Prince George's County; i ...

* Chevy Chase, Maryland *

College Park, Maryland College Park is a city in Prince George's County, Maryland, United States, located approximately from the northeast border of Washington, D.C. Its population was 34,740 at the 2020 United States census. It is the home of the University of Mary ...

Frederick, Maryland Frederick is a city in, and the county seat of, Frederick County, Maryland, United States. Frederick's population was 78,171 people as of the 2020 United States census, 2020 census, making it the List of municipalities in Maryland, second-largest ...

Gaithersburg, Maryland Gaithersburg ( ) is a city in Montgomery County, Maryland, United States. At the time of the 2020 United States census, Gaithersburg had a population of 69,657, making it the third-largest incorporated city and the ninth-most populous communit ...

Germantown, Maryland Germantown is an urbanized census-designated place in Montgomery County, Maryland, United States. With a population of 91,249 as of the 2020 census, it is the third-most populous community in Maryland, after Baltimore and Columbia, Maryland, Col ...

Laurel, Maryland Laurel is a city in Maryland, United States, located midway between Washington, D.C., and Baltimore on the banks of the Patuxent River, in northern Prince George's County. Its population was 30,060 at the 2020 census. Founded as a mill town i ...

Potomac, Maryland Potomac () is an Unincorporated area#United States, unincorporated community and census-designated place in Montgomery County, Maryland, United States. As of the 2020 United States census, 2020 census, it had a population of 47,018. It is named a ...

Rockville, Maryland Rockville is a city in and the county seat of Montgomery County, Maryland, United States, and is part of the Washington metropolitan area. The 2020 United States census, 2020 census tabulated Rockville's population at 67,117, making it the fourth ...

Silver Spring, Maryland Silver Spring is a census-designated place (CDP) in southeastern Montgomery County, Maryland, United States, near Washington, D.C. Although officially Unincorporated area, unincorporated, it is an edge city with a population of 81,015 at the 2020 ...

Upper Marlboro, Maryland Upper Marlboro, officially the Town of Upper Marlboro, is the county seat of Prince George's County, Maryland, United States. As of the 2020 United States census, 2020 census, the population within the town limits was 652, although Greater Upper ...

Annandale, Virginia Annandale () is a census-designated place (CDP) in Fairfax County, Virginia.Arlington, Virginia Arlington County, or simply Arlington, is a County (United States), county in the U.S. state of Virginia. The county is located in Northern Virginia on the southwestern bank of the Potomac River directly across from Washington, D.C., the nati ...

Ashburn, Virginia Ashburn is a unincorporated settlement and census-designated place (CDP) in Loudoun County, Virginia, United States. At the 2020 United States census, its population was 46,349, up from 3,393 in 1990. It is northwest of Washington, D.C., and par ...

Chantilly, Virginia Chantilly is a census-designated place (CDP) in western Fairfax County, Virginia, United States. The population was 24,301 as of the 2020 census. Chantilly is named after an early-19th-century mansion and farm, which in turn took the name of an ...

Great Falls, Virginia Great Falls is a census-designated place in Fairfax County, Virginia, United States. The population at the 2020 census was 15,953. History Colonial farm settlements began to form in the area as early as the late 1700s. Early on, the village ...

Herndon, Virginia Herndon is a town in Fairfax County, Virginia, United States. Located in Northern Virginia, it is part of the Washington, D.C., metropolitan area, Washington, D.C. metropolitan area. In 2020, the population at the census was 24,655, which makes i ...

* Langley, Virginia *

Leesburg, Virginia Leesburg is a town in and the county seat of Loudoun County, Virginia, United States. It is part of both the Northern Virginia region of the state and the Washington metropolitan area, including Washington, D.C., the nation's capital. European se ...

* Manassas Park, Virginia * Massaponax, Virginia *

McLean, Virginia McLean ( ) is an Unincorporated area#United States, unincorporated community and census-designated place in Fairfax County, Virginia, United States. The population of the community was 50,773 at the 2020 United States census, 2020 census. It is ...

* Mt. Vernon, Virginia *

Reston, Virginia Reston is a census-designated place in Fairfax County, Virginia, United States, and a principal city of both Northern Virginia and the Washington metropolitan area. As of the 2020 U.S. census, Reston's population was 63,226. Founded in 1964, Rest ...

Springfield, Virginia Springfield is a census-designated place (CDP) in Fairfax County, Virginia, Fairfax County, Virginia, United States. The Springfield CDP is recognized by the United States Census Bureau, U.S. Census Bureau with a population of 31,339 as of the 20 ...

Tysons, Virginia Tysons, also known as Tysons Corner, is a census-designated place (CDP) in Fairfax County, Virginia, United States, spanning from the corner of Virginia State Route 123, SR 123 (Chain Bridge Road) and Virginia State Route 7, SR 7 (Leesburg Pike ...

Vienna, Virginia Vienna () is a town in Fairfax County, Virginia, United States. As of the 2020 United States census, 2020 U.S. census, Vienna has a population of 16,473. Significantly more people live in ZIP codes with the Vienna postal addresses (22180, 22181, ...

Charles Town, West Virginia Charles Town is a city in Jefferson County, West Virginia, United States, and its county seat. The population was 6,534 at the 2020 United States Census, 2020 census. The city is named for its founder Charles Washington, youngest brother of Pres ...

Martinsburg, West Virginia Martinsburg is a city in Berkeley County, West Virginia, United States, and its county seat. The population was 18,773 at the 2020 United States census, 2020 census, making Martinsburg the largest city in the Eastern Panhandle of West Virginia a ...

Economy

Primary industries

Biotechnology

Maryland's Washington suburbs are a major center for

biotechnology Biotechnology is a multidisciplinary field that involves the integration of natural sciences and Engineering Science, engineering sciences in order to achieve the application of organisms and parts thereof for products and services. Specialists ...

. Prominent local biotechnology companies include

MedImmune MedImmune, LLC was a wholly owned subsidiary of AstraZeneca before February 14, 2019, when it was announced that the MedImmune name and branding would be discontinued in favor of AstraZeneca. MedImmune was founded in 1988 as Molecular Vaccines, ...

, United Therapeutics, The Institute for Genomic Research, Human Genome Sciences, and the

Howard Hughes Medical Institute The Howard Hughes Medical Institute (HHMI) is an American non-profit medical research organization headquartered in Chevy Chase, Maryland with additional facilities in Ashburn, Virginia. It was founded in 1953 by Howard Hughes, an American busin ...

Defense contracting

Many defense contractors are based in Northern Virginia and Montgomery County, Maryland to be close to

the Pentagon The Pentagon is the headquarters building of the United States Department of Defense, in Arlington County, Virginia, across the Potomac River from Washington, D.C. The building was constructed on an accelerated schedule during World War II. As ...

in Arlington. Local defense contractors include

Lockheed Martin The Lockheed Martin Corporation is an American Arms industry, defense and aerospace manufacturer with worldwide interests. It was formed by the merger of Lockheed Corporation with Martin Marietta on March 15, 1995. It is headquartered in North ...

, the largest, as well as

Northrop Grumman Northrop Grumman Corporation is an American multinational Aerospace manufacturer, aerospace and Arms industry, defense company. With 97,000 employees and an annual revenue in excess of $40 billion, it is one of the world's largest Arms industry ...

General Dynamics General Dynamics Corporation (GD) is an American publicly traded aerospace and defense corporation headquartered in Reston, Virginia. As of 2020, it was the fifth largest defense contractor in the world by arms sales and fifth largest in the Unit ...

, BAE Systems Inc.,

Computer Sciences Corporation Computer Sciences Corporation (CSC) was an American multinational corporation that provided information technology (IT) services and professional services. On April 3, 2017, it merged with the Enterprise Services line of business of HP Ente ...

(CSC),

Booz Allen Hamilton Booz Allen Hamilton Holding Corporation (informally Booz Allen) is the parent of Booz Allen Hamilton Inc., an American company specializing in intelligence, AI, and digital transformation. It is headquartered in McLean, Virginia, in the Washing ...

Leidos Leidos Holdings, Inc. is an American defense company, defense, Aerospace manufacturer, aviation, information technology, and biomedical research company headquartered in Reston, Virginia, that provides scientific, engineering, systems integrati ...

Science Applications International Corporation Science Applications International Corporation, Inc. (SAIC) is an American technology company headquartered in Reston, Virginia that provides government services and information technology support. History 20th century The original SAIC was cr ...

(SAIC),

Orbital Sciences Corporation Orbital Sciences Corporation (commonly referred to as Orbital) was an American company specializing in the design, manufacture, and launch of small- and medium- class space and launch vehicle systems for commercial, military and other governmen ...

, and AAI Corporation.

Notable company headquarters in the region

''Numbers denote

Fortune 500 The ''Fortune'' 500 is an annual list compiled and published by ''Fortune (magazine), Fortune'' magazine that ranks 500 of the largest United States Joint-stock company#Closely held corporations and publicly traded corporations, corporations by ...

ranking.''

Maryland

Baltimore area: * AAI Corporation ( Hunt Valley) * Advertising.com (

) * Allegis Group (

Hanover Hanover ( ; ; ) is the capital and largest city of the States of Germany, German state of Lower Saxony. Its population of 535,932 (2021) makes it the List of cities in Germany by population, 13th-largest city in Germany as well as the fourth-l ...

) *

Black & Decker Black+Decker is an American manufacturer of power tools, accessories, hardware, home improvement products, home appliances, and fastening systems, headquartered in Towson, Maryland, north of Baltimore, where the company was originally establis ...

( Towson) *

Ciena Ciena Corporation is an American optical networking systems and software company based in Hanover, Maryland. The company has been described as a vital player in optical connectivity. The company reported revenues of $4 billion and more than 8,50 ...

Corporation (

) * Colfax Corporation ( Annapolis Junction) * Constellation Energy (

) *

Corporate Office Properties Trust COPT Defense Properties, an S&P 400, S&P MidCap 400 Company, is a fully integrated and self-managed Real estate investment trust, REIT focused on owning, operating and developing properties in locations proximate to, or sometimes containing, key ...

( Columbia) * The Cordish Companies (

) *

CoverGirl CoverGirl is an American cosmetics brand founded in Maryland, United States, by the Noxzema Chemical Company. It was acquired by Procter & Gamble in 1989, and later acquired by Coty, Inc. in 2016. The Noxell Company advertised this cosmetics l ...

( Hunt Valley) * Fila USA ( Sparks) *

Firaxis Games Firaxis Games, Inc. is an American video game developer based in Sparks, Maryland. The company was founded in May 1996 by Sid Meier, Jeff Briggs, and Brian Reynolds (game designer), Brian Reynolds following their departure from MicroProse, Meie ...

( Sparks) * First Friday's Group (Baltimore) * Legg Mason (

) * McCormick & Company ( Hunt Valley) ''482'' *

MICROS Systems Micros Systems, Inc. was an American computer company who manufactured hardware and developed software and services for the restaurant point of sale, hotel, hospitality, sports and entertainment venues, casinos, cruise lines, specialty retail ma ...

( Columbia) * Millennial Media (

) * Nielsen Audio ( Columbia) * Pandora Jewelry USA (

) * T. Rowe Price (

) ''447'' * Transamerica Corporation (

) *

Sinclair Broadcast Group Sinclair, Inc., doing business as Sinclair Broadcast Group, is a publicly traded American telecommunications conglomerate that is controlled by the descendants of company founder Julian Sinclair Smith. Headquartered in the Baltimore suburb o ...

( Hunt Valley) ''465'' * Sourcefire ( Columbia) * Sylvan Learning (

) *

Under Armour Under Armour, Inc. is an American sportswear company that manufactures footwear and clothing, apparel headquartered in Baltimore, Maryland, United States. History 20th century Under Armour was founded on September 25, 1996, by Kevin Plank, a ...

(

) * W.R. Grace & Co. ( Columbia) * The Whiting-Turner Contracting Company ( Towson) Washington area: *

2U (company) 2U is an American educational technology company that contracts with non-profit colleges and universities to build, deliver, and support online degree and non-degree programs. It owns edX. Kees Bol is its CEO. History 2U was founded in 2008 by ...

(

Lanham, Maryland Lanham is an unincorporated community and census-designated place in Prince George's County, Maryland. As of the 2020 United States census, it has a population of 11,282. The New Carrollton station (the terminus of the Washington Metro's O ...

) * ASRC Aerospace Corporation (

Greenbelt, Maryland Greenbelt is a city in Prince George's County, Maryland, United States, and a suburb of Washington, D.C. At the 2020 United States census, 2020 census, the population was 24,921. Greenbelt is the first and the largest of the three experimental ...

) *

Bethesda Softworks Bethesda Softworks LLC is an American video game publisher based in Rockville, Maryland. The company was founded by Christopher Weaver in 1986 as a Division (business), division of Media Technology Limited. In 1999, it became a subsidiary of Z ...

( Rockville) * Clark Construction ( Bethesda) * Choice Hotels ( Rockville) * Coventry Health Care ( Bethesda) * EagleBank ( Bethesda) * Enviva ( Bethesda) * Federal Realty Investment Trust ( Rockville) *

GEICO The Government Employees Insurance Company (GEICO ) is an American vehicle insurance company headquartered in Chevy Chase, Maryland. In addition to auto insurance, GEICO provides motorcycle, ATV, RV, boat, snowmobile, travel, pet, event, hom ...

(

Chevy Chase Cornelius Crane "Chevy" Chase (; born October 8, 1943) is an American comedian, actor, and writer. He became the breakout cast member in the first season of ''Saturday Night Live'' (1975–1976), where his recurring ''Weekend Update'' segment b ...

) * Host Hotels & Resorts ( Bethesda) ''472'' * Hughes Network Systems ( Germantown) * Inovalon (

) * JBG Smith (

) *

( Bethesda) ''49'' *

Marriott International Marriott International, Inc. is an American multinational corporation, multinational company that operates, franchises, and licenses lodging brands that include hotel, residential, and timeshare properties. Marriott International owns over 37 ho ...

( Bethesda) ''293'' *

(

Gaithersburg Gaithersburg ( ) is a city in Montgomery County, Maryland, United States. At the time of the 2020 United States census, Gaithersburg had a population of 69,657, making it the third-largest incorporated city and the ninth-most populous communit ...

) *

New Enterprise Associates New Enterprise Associates (NEA) is an American-based venture capital firm. NEA focuses investment stages ranging from seed stage through growth stage across an array of industry sectors. With over $25 billion in committed capital, NEA is one of t ...

(

) *

Novavax Novavax, Inc. is an American biotechnology company based in Gaithersburg, Maryland, that develops vaccines to counter serious infectious diseases. Prior to 2020, company scientists developed experimental vaccines for influenza and respiratory sy ...

(

) * Radio One ( Lanham) * Ritz-Carlton (

) *

Travel Channel Travel Channel (stylized as Trvl Channel since 2018) is an American pay television television channel, channel owned by Warner Bros. Discovery, who previously owned the channel from 1997 to 2007. The channel is headquartered in Manhattan, with ...

(

) * TV One ( Silver Spring) * United Therapeutics ( Silver Spring)

Northern Virginia

AES Corporation The AES Corporation is an American utility and power generation company. It owns and operates power plants, which it uses to generate and sell electricity to end users and intermediaries like utilities and industrial facilities. AES, headquarte ...

( Arlington) ''194'' * Amazon ( Crystal City) * Appian Corporation ( Tysons Corner) * AvalonBay Communities ( Arlington) * Airbus North America ( Herndon) * BAE Systems Inc. ( Arlington) *

Bechtel Bechtel Corporation () is an American engineering, procurement, construction, and project management company founded in San Francisco, California in 1898, and headquartered in Reston, Virginia in the Washington metropolitan area. , the '' E ...

( Reston) * Bloomberg Industry Group ( Arlington) *

Boeing The Boeing Company, or simply Boeing (), is an American multinational corporation that designs, manufactures, and sells airplanes, rotorcraft, rockets, satellites, and missiles worldwide. The company also provides leasing and product support s ...

( Arlington) ''58'' *

( McLean) ''481'' *

CACI CACI International Inc. (originally California Analysis Center, Inc., then Consolidated Analysis Center, Inc.) is an American multinational corporation, multinational professional services and information technology company headquartered in Nor ...

( Arlington) *

Capital One Capital One Financial Corporation is an American bank holding company founded on July 21, 1994, and specializing in credit cards, auto loans, banking, and savings accounts, headquartered in Tysons, Virginia, with operations primarily in the ...

( McLean) ''100'' * Carfax ( Centreville, Virginia) *

( Falls Church) ''379'' *

Communications Satellite Corporation Communications Satellite Corporation (COMSAT) is a global telecommunications company based in the United States. By 2007, it had branches in Brazil, Argentina, Colombia, Mexico, Peru, Venezuela and several other countries in the Americas. Alt ...

( Herndon) *

Comscore Comscore, Inc. is an American-based global media measurement and analytics company providing marketing data and analytics to enterprises, advertising agencies, brand marketers, and publishers. History Comscore was founded in July 1999 in Resto ...

( Reston) * Cvent ( Tysons Corner) * DynCorp International ( Falls Church) *

Freddie Mac The Federal Home Loan Mortgage Corporation (FHLMC), commonly known as Freddie Mac, is an American publicly traded, government-sponsored enterprise (GSE), headquartered in Tysons, Virginia.McLean) ''39'' * FNH USA ( Fredericksburg) * FLIR Systems Government and Defense ( Arlington) *

Graham Holdings Graham Holdings Company (formerly The Washington Post Company) is a diversified American conglomerate holding company. Headquartered in Arlington County, Virginia, and incorporated in Delaware, it was formerly the owner of ''The Washington Po ...

( Arlington) *

Gannett Company Gannett Co., Inc. ( ) is an American mass media holding company headquartered in New York City. It is the largest U.S. newspaper publisher as measured by total daily circulation. It owns the national newspaper ''USA Today'', as well as severa ...

( McLean) *

( Falls Church) ''90'' * GTT Communications ( Tysons Corner) * Hilton Hotels Corporation ( McLean) ''241'' *

ICF International ICF International, Inc. is an American Public company, publicly traded consulting and technology services company based in Reston, Virginia. The company was founded in 1969, and as of 2019, had US $1.48 billion in revenue, with approximately 9,0 ...

( Fairfax) *

Iridium Communications Iridium Communications Inc. (formerly Iridium Satellite LLC) is a publicly traded American company headquartered in McLean, Virginia, United States. Iridium operates the Iridium satellite constellation, a system of 80 satellites: 66 are active ...

( McLean) * Stride, Inc. ( Herndon) * Kellogg Brown and Root Services ( Arlington) *

( Reston) ''381'' *

Ligado Networks Ligado Networks, formerly known as LightSquared, is an American satellite communications company. After restructuring, emerging from bankruptcy and modifying its network plan, the new company, Ligado Networks, launched in 2016. It operates the S ...

( Reston) *

Mars, Incorporated Mars, Incorporated (doing business as Mars Inc.) is an American multinational manufacturer of confectionery, pet food, and other food products and a provider of animal care services founded on June 23, 1911, headquartered in McLean, Virgini ...

( McLean) * M.C. Dean, Inc. ( Dulles) * MicroStrategy ( Tysons Corner) * Naviance ( Arlington) * Navy Federal Credit Union (

Vienna Vienna ( ; ; ) is the capital city, capital, List of largest cities in Austria, most populous city, and one of Federal states of Austria, nine federal states of Austria. It is Austria's primate city, with just over two million inhabitants. ...

) * NII Holdings ( Reston) *

( Falls Church) ''114'' * NVR Incorporated ( Reston) ''446'' *

Orbital Sciences Orbital Sciences Corporation (commonly referred to as Orbital) was an American company specializing in the design, manufacture, and launch of small- and medium- class space and launch vehicle systems for commercial, military and other governmen ...

( Dulles) * Park Hotels & Resorts ( Tysons Corner) *

Parsons Corporation Parsons Corporation is an American multinational technology-focused defense, intelligence, and infrastructure engineering firm. Founded in 1944, Parsons is headquartered in Chantilly, Virginia, and serves both government and private sector orga ...

( Centreville) *

Rolls-Royce North America Rolls-Royce North America, Inc. is a subsidiary of multinational corporation Rolls-Royce plc. The American unit operates under a Special Security Arrangement which allows it to work independently on some of the most sensitive United States de ...

( Reston) *

Rosetta Stone The Rosetta Stone is a stele of granodiorite inscribed with three versions of a Rosetta Stone decree, decree issued in 196 BC during the Ptolemaic dynasty of ancient Egypt, Egypt, on behalf of King Ptolemy V Epiphanes. The top and middle texts ...

( Arlington) *

( McLean) *

SLM Corporation SLM Corporation (commonly known as Sallie Mae; originally the Student Loan Marketing Association) is a publicly traded U.S. corporation that provides consumer banking. Its nature has changed dramatically since it was set up in the early 1970s; i ...

( Reston) "Sallie Mae" * Strategic Education, Inc. ( Herndon) * Space Adventures (

) *

Tegna Inc. Tegna Inc. (stylized in all caps as TEGNA) is an American publicly traded broadcast, digital media and marketing services company headquartered in Tysons, Virginia. It was created on June 29, 2015, when the Gannett Company split into two publ ...

( Tysons Corner) *

The Motley Fool The Motley Fool is a private financial and investing advice company based in Alexandria, Virginia. It was founded in July 1993 by co-chairmen and brothers David Gardner and Tom Gardner, and Todd Etter and Erik Rydholm. The company employs over 3 ...

(

) *

The Teaching Company The Teaching Company, doing business as The Great Courses, formerly Wondrium, is a Media (communication), media production company which produces Education, educational, video, and audio content in the form of courses, documentaries, and series ...

( Chantilly) *

Verisign Verisign, Inc. is an American company based in Reston, Virginia, that operates a diverse array of network infrastructure, including two of the Internet's thirteen root nameservers, the authoritative registry for the , , and generic top-level d ...

( Reston) * Verizon Business ( Ashburn) * Volkswagen Group of America ( Herndon) * VSE Corporation (

) * XO Communications ( Herndon)

Washington, D.C.

* &pizza * APCO Worldwide * Atlantic Media *

Black Entertainment Television Black Entertainment Television (BET) is an American basic cable channel targeting Black American audiences. It is the flagship channel of the BET Media Group, a subsidiary of Paramount Global's CBS Entertainment Group. Originally launched ...

* Blackboard Inc. * Bluemercury *

Carlyle Group The Carlyle Group Inc. is an American multinational company with operations in private equity, alternative asset management and financial services. As of 2023, the company had $426 billion of assets under management. Carlyle specializes in ...

* Chemonics *

Cogent Communications Cogent Communications Holdings, Inc. is a multinational internet service provider based in the United States. Cogent's primary services consist of Internet access and data transport, offered on a fiber optic, IP data-only network, along with coloc ...

CoStar Group CoStar Group, Inc. is an American provider of information, analytics, and marketing services to the commercial property industry in North America and Europe. Founded in 1987 by Andrew C. Florance and based in Arlington, Virginia, the company has ...

Danaher Corporation Danaher Corporation is an American global conglomerate founded in 1984 by brothers Steven and Mitchell Rales. Headquartered in Washington, D.C., the company designs, manufactures, and markets medical, industrial, and commercial products and ...

''239'' *

Fannie Mae The Federal National Mortgage Association (FNMA), commonly known as Fannie Mae, is a United States government-sponsored enterprise (GSE) and, since 1968, a publicly traded company. Founded in 1938 during the Great Depression as part of the New ...

''53'' *

FiscalNote FiscalNote Holdings, Inc., or commonly FiscalNote, is a publicly traded software, data, and media company headquartered in Washington, D.C. The company was founded by Timothy Hwang, Gerald Yao, and Jonathan Chen in 2013. FiscalNote provides sof ...

* Framebridge * Gallup * Mapbox * Morning Consult *

National Geographic Society The National Geographic Society, headquartered in Washington, D.C., United States, is one of the largest nonprofit scientific and educational organizations in the world. Founded in 1888, its interests include geography, archaeology, natural sc ...

* NGP VAN * Pepco Holdings ''279'' * Social Tables * The Washington Post Company *

Vox Media Vox Media, Inc. is an American mass media company founded in Washington, D.C. with operational headquarters in Lower Manhattan, New York City. The company was established in November 2011 by CEO Jim Bankoff and Trei Brundrett to encompass ''S ...

XM Satellite Radio XM Satellite Radio Holdings Inc. (XM) was one of the three satellite radio ( SDARS) and online radio services in the United States and Canada, operated by Sirius XM Holdings. It provided pay-for-service radio, analogous to subscription cable ...

Sports

Table of professional teams and venues

Transportation

Washington Dulles International Airport at Dusk

Commercial airports

Rail transit systems

Amtrak The National Railroad Passenger Corporation, Trade name, doing business as Amtrak (; ), is the national Passenger train, passenger railroad company of the United States. It operates intercity rail service in 46 of the 48 contiguous United Stat ...

* Baltimore Light Rail *

DC Streetcar The DC Streetcar is a surface streetcar network in Washington, D.C. that consists of a single line running in mixed traffic along H Street and Benning Road in the city's Northeast quadrant. The streetcars are the first to run in the Distri ...

* MARC Train * Baltimore Metro * '' Purple Line'' (future light rail) *

Virginia Railway Express Virginia Railway Express (VRE) is a commuter rail service that connects outlying small cities of Northern Virginia to Washington Union Station in Washington, D.C. It operates two lines which run during weekday rush hour only: the Fredericksbur ...

Washington Metro The Washington Metro, often abbreviated as the Metro and formally the Metrorail, is a rapid transit system serving the Washington metropolitan area of the United States. It is administered by the Washington Metropolitan Area Transit Authority ...

Major highways

Interstates * I-66

Interstate 66 Interstate 66 (I-66) is a 76.32 mile east–west Interstate Highway in the East Coast of the United States, eastern United States. The highway runs from an interchange with Interstate 81 in Virginia, I-81 near Middletown, Virginia, on its w ...

Interstate 70 Interstate 70 (I-70) is a major east–west Interstate Highway in the United States that runs from Interstate 15, I-15 near Cove Fort, Utah, to Interstate 695 (Maryland), I-695 and Maryland Route 570 (MD 570) in Woodlawn, Baltimo ...

Interstate 81 Interstate 81 (I-81) is a north–south (physically northeast–southwest) Interstate Highway in the eastern part of the United States. Its southern terminus is at Interstate 40, I-40 in Dandridge, Tennessee, Dandridge, Tennessee; its nort ...

Interstate 83 Interstate 83 (I-83) is an Interstate Highway located in the states of Maryland and Pennsylvania in the Eastern United States. Its southern terminus is at a signalized intersection with Fayette Street in Baltimore, Baltimore, Maryland; its ...

Interstate 95 Interstate 95 (I-95) is the main north–south Interstate Highway on the East Coast of the United States, running from U.S. Route 1 (US 1) in Miami, Florida, north to the Houlton–Woodstock Border Crossing between Maine and the ...

Interstate 97 Interstate 97 (I-97) is a north-south Interstate Highway System, Interstate Highway in the eastern United States. It runs entirely within Anne Arundel County, Maryland, for from U.S. Route 50 in Maryland, U.S. Route 50/U.S. Route 30 ...

Interstate 195 * I-270

Interstate 270 * I-295

Interstate 295 * I-370

Interstate 370 * I-395

Interstate 395 (District of Columbia-Virginia) * I-395

Interstate 395 (Maryland) * I-495

Interstate 495 (Capital Beltway) * I-595

Interstate 595 (Unsigned) * I-695

Interstate 695 (District of Columbia) * I-695

Interstate 695 (Baltimore Beltway) * I-795

Interstate 795 * I-895

Interstate 895 U.S. Routes * US 1

U.S. Route 1 * US 11

U.S. Route 11 * US 15

U.S. Route 15 * US 29

U.S. Route 29 U.S. Route 29 or U.S. Highway 29 (US 29) is a north–south United States Numbered Highway that runs for from Pensacola, Florida, to Ellicott City, Maryland, just west of Baltimore, Baltimore, Maryland, in the Eastern United Stat ...

U.S. Route 40 * US 50

U.S. Route 50 U.S. Route 50 or U.S. Highway 50 (US 50) is a major east–west route of the U.S. Highway system, stretching from Interstate 80 (I-80) in West Sacramento, California, to Maryland Route 528 (MD 528) in Ocean City, Maryland, on the Atlantic ...

U.S. Route 301 * US 340

U.S. Route 340 State Routes * MD Route 2

Maryland Route 2 Maryland Route 2 (MD 2) is the longest state highway in the U.S. state of Maryland. The route runs from Solomons, Maryland, Solomons Island in Calvert County, Maryland, Calvert County north to an intersection with U.S. Route 1 in Maryland, U ...

Maryland Route 4 Maryland Route 4 (MD 4) is a state highway in the U.S. state of Maryland. The highway runs from Maryland Route 5, MD 5 in Leonardtown, Maryland, Leonardtown north to Southern Avenue (Washington, D.C.), Southern Avenue in Suitland, Maryland, S ...

Maryland Route 5 Maryland Route 5 (MD 5) is a long state highway that runs north–south in the U.S. state of Maryland. The highway runs from Point Lookout, Maryland, Point Lookout in St. Mary's County, Maryland, St. Mary's County north to the Washington, ...

Maryland Route 26 * MD Route 32

Maryland Route 32 * MD Route 97

Maryland Route 97 Maryland Route 97 (MD 97) is a state highway in the U.S. state of Maryland. The route runs from U.S. Route 29 in Maryland, U.S. Route 29 (US 29) in Silver Spring, Maryland, Silver Spring, Montgomery County, Maryland, Mont ...

Maryland Route 100 Maryland Route 100 (MD 100) is a major east–west highway connecting U.S. Route 29 in Maryland, U.S. Route 29 (US 29) in Ellicott City, Maryland, Ellicott City (just north of Columbia, Maryland, Columbia) and Maryland Route 177, MD 177 (M ...

Maryland Route 200 Maryland Route 200 (MD 200), also known as the Intercounty Connector or ICC, is an controlled-access highway, controlled-access toll road in the U.S. state of Maryland. It connects Gaithersburg, Maryland, Gaithersburg in Montgomery County, Ma ...

(Intercounty Connector) * MD Route 295

Baltimore–Washington Parkway (Maryland Route 295) * MD Route 355

Maryland Route 355 Maryland Route 355 (MD 355) is a north–south road in western central Maryland in the United States. The southern terminus of the route is in Bethesda, Maryland, Bethesda in Montgomery County, Maryland, Montgomery County, where ...

Virginia State Route 3 Virginia State Route 3 is a primary state highway in the U.S. state of Virginia that extends from the town of Culpeper, Virginia, Culpeper south and eastwardly to Gloucester, Virginia, Gloucester in Virginia's Middle Peninsula region. For many ...