Montgomery County is in the southwestern part of the

U.S. state In the United States, a state is a constituent political entity, of which there are 50. Bound together in a political union, each state holds governmental jurisdiction over a separate and defined geographic territory where it shares its so ...

Ohio Ohio ( ) is a U.S. state, state in the Midwestern United States, Midwestern region of the United States. It borders Lake Erie to the north, Pennsylvania to the east, West Virginia to the southeast, Kentucky to the southwest, Indiana to the ...

. At the 2020 census, the population was 537,309, making it the fifth-most populous county in Ohio. The

county seat A county seat is an administrative center, seat of government, or capital city of a county or parish (administrative division), civil parish. The term is in use in five countries: Canada, China, Hungary, Romania, and the United States. An equiva ...

Dayton Dayton () is a city in Montgomery County, Ohio, United States, and its county seat. It is the List of cities in Ohio, sixth-most populous city in Ohio, with a population of 137,644 at the 2020 United States census, 2020 census. The Dayton metro ...

. The county was named in honor of

Richard Montgomery Richard Montgomery (2 December 1738 – 31 December 1775) was an Irish-born American military officer who first served in the British Army. He later became a major general in the Continental Army during the American Revolutionary War, and ...

, an

American Revolutionary War The American Revolutionary War (April 19, 1775 – September 3, 1783), also known as the Revolutionary War or American War of Independence, was the armed conflict that comprised the final eight years of the broader American Revolution, in which Am ...

general, who was killed in

1775 Events Summary The American Revolutionary War began this year, with the first military engagement on April 19 Battles of Lexington and Concord on the day after Paul Revere's ride. The Second Continental Congress took various steps tow ...

while attempting to capture

Quebec City Quebec City is the capital city of the Provinces and territories of Canada, Canadian province of Quebec. As of July 2021, the city had a population of 549,459, and the Census Metropolitan Area (including surrounding communities) had a populati ...

Canada Canada is a country in North America. Its Provinces and territories of Canada, ten provinces and three territories extend from the Atlantic Ocean to the Pacific Ocean and northward into the Arctic Ocean, making it the world's List of coun ...

. Montgomery County is part of the Dayton, Ohio, Metropolitan Statistical Area.

Geography

The county has a total area of , of which is land and (0.6%) is water.

Adjacent counties

* Miami County (north) * Clark County (northeast) * Greene County (east) * Warren County (south) * Butler County (southwest) * Preble County (west) * Darke County (northwest)

Major highways

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 70 Alternate *

Interstate 75 Interstate 75 (I-75) is a major north–south Interstate Highway in the Great Lakes and Southeastern regions of the United States. As with most Interstates that end in 5, it is a major cross-country, north–south route, traveling from S ...

* Interstate 675 * U.S. Route 25 * U.S. Route 35 * U.S. Route 40 * State Route 4 * State Route 48 * State Route 49 * State Route 123 * State Route 201 * State Route 202 * State Route 235 * State Route 444 * State Route 725 * State Route 741 * State Route 835

National protected area

* Dayton Aviation Heritage National Historical Park (part)

Demographics

2000 census

As of the

census A census (from Latin ''censere'', 'to assess') is the procedure of systematically acquiring, recording, and calculating population information about the members of a given Statistical population, population, usually displayed in the form of stati ...

of 2000, there were 559,062 people, 229,229 households, and 146,935 families living in the county. The

population density Population density (in agriculture: Standing stock (disambiguation), standing stock or plant density) is a measurement of population per unit land area. It is mostly applied to humans, but sometimes to other living organisms too. It is a key geog ...

was . There were 248,443 housing units at an average density of . The racial makeup of the county was 76.57%

White White is the lightest color and is achromatic (having no chroma). It is the color of objects such as snow, chalk, and milk, and is the opposite of black. White objects fully (or almost fully) reflect and scatter all the visible wa ...

, 19.86%

Black Black is a color that results from the absence or complete absorption of visible light. It is an achromatic color, without chroma, like white and grey. It is often used symbolically or figuratively to represent darkness.Eva Heller, ''P ...

African American African Americans, also known as Black Americans and formerly also called Afro-Americans, are an Race and ethnicity in the United States, American racial and ethnic group that consists of Americans who have total or partial ancestry from an ...

, 0.23% Native American, 1.31% Asian, 0.04%

Pacific Islander Pacific Islanders, Pasifika, Pasefika, Pacificans, or rarely Pacificers are the peoples of the list of islands in the Pacific Ocean, Pacific Islands. As an ethnic group, ethnic/race (human categorization), racial term, it is used to describe th ...

, 0.49% from other races, and 1.51% from two or more races. 1.27% of the population were

Hispanic The term Hispanic () are people, Spanish culture, cultures, or countries related to Spain, the Spanish language, or broadly. In some contexts, Hispanic and Latino Americans, especially within the United States, "Hispanic" is used as an Ethnici ...

or Latino of any race. There were 229,229 households, out of which 29.60% had children under the age of 18 living with them, 46.30% were

married couples Marriage, also called matrimony or wedlock, is a culturally and often legally recognised union between people called spouses. It establishes rights and obligations between them, as well as between them and their children (if any), and b ...

living together, 13.80% had a female householder with no husband present, and 35.90% were non-families. 30.40% of all households were made up of individuals, and 10.10% had someone living alone who was 65 years of age or older. The average household size was 2.37, and the average family size was 2.96. In the county, the population was spread out, with 24.70% under the age of 18, 9.70% from 18 to 24, 29.00% from 25 to 44, 22.90% from 45 to 64, and 13.70% who were 65 years of age or older. The median age was 36 years. For every 100 females, there were 92.30 males. For every 100 females age 18 and over, there were 88.60 males. The

median income The median income is the income amount that divides a population into two groups, half having an income above that amount, and half having an income below that amount. It may differ from the mean (or average) income. Both of these are ways of unde ...

for a household in the county was $40,156, and the median income for a family was $50,071. Males had a median income of $38,710 versus $27,297 for females. The

per capita income Per capita income (PCI) or average income measures the average income earned per person in a given area (city, region, country, etc.) in a specified year. In many countries, per capita income is determined using regular population surveys, such ...

for the county was $21,743. About 8.30% of families and 11.30% of the population were below the

poverty line The poverty threshold, poverty limit, poverty line, or breadline is the minimum level of income deemed adequate in a particular country. The poverty line is usually calculated by estimating the total cost of one year's worth of necessities for ...

, including 15.60% of those under age 18 and 8.20% of those age 65 or over.

2010 census

As of the 2010 census, there were 535,153 people, 223,943 households, and 138,060 families living in the county. The population density was . There were 254,775 housing units at an average density of . The racial makeup of the county was 73.9% white, 20.9% black or

, 1.7% Asian, 0.2% American Indian, 0.8% from other races, and 2.4% from two or more races. Those of

or Latino origin made up 2.3% of the population. In terms of ancestry, 24.9% were German, 12.8% were Irish, 9.7% were American, and 8.8% were English. Of the 223,943 households, 29.7% had children under the age of 18 living with them, 41.6% were married couples living together, 15.3% had a female householder with no husband present, 38.4% were non-families, and 32.2% of all households were made up of individuals. The average household size was 2.33, and the average family size was 2.94. The median age was 39.2 years. The median income for a household in the county was $43,965, and the median income for a family was $56,559. Males had a median income of $45,680 versus $34,991 for females. The per capita income for the county was $24,828. About 11.7% of families and 15.7% of the population were below the

, including 22.7% of those under age 18 and 8.7% of those aged 65 or over.

Politics

Montgomery County has been a slightly Democratic-leaning swing county since the

Civil War A civil war is a war between organized groups within the same Sovereign state, state (or country). The aim of one side may be to take control of the country or a region, to achieve independence for a region, or to change government policies.J ...

. After voting consistently Democratic in presidential elections from 1992 to 2012, Republican

Donald Trump Donald John Trump (born June 14, 1946) is an American politician, media personality, and businessman who is the 47th president of the United States. A member of the Republican Party (United States), Republican Party, he served as the 45 ...

narrowly defeated Democrat

Hillary Clinton Hillary Diane Rodham Clinton ( Rodham; born October 26, 1947) is an American politician, lawyer and diplomat. She was the 67th United States secretary of state in the administration of Barack Obama from 2009 to 2013, a U.S. senator represent ...

in the county in

2016 2016 was designated as: * International Year of Pulses by the sixty-eighth session of the United Nations General Assembly. * International Year of Global Understanding (IYGU) by the International Council for Science (ICSU), the Internationa ...

. The last Democrat to win the county by double digits was

Lyndon B. Johnson Lyndon Baines Johnson (; August 27, 1908January 22, 1973), also known as LBJ, was the 36th president of the United States, serving from 1963 to 1969. He became president after the assassination of John F. Kennedy, under whom he had served a ...

1964 Events January * January 1 – The Federation of Rhodesia and Nyasaland is dissolved. * January 5 – In the first meeting between leaders of the Roman Catholic and Orthodox churches since the fifteenth century, Pope Paul VI and Patria ...

, while the last Republican to do so was

George H. W. Bush George Herbert Walker BushBefore the outcome of the 2000 United States presidential election, he was usually referred to simply as "George Bush" but became more commonly known as "George H. W. Bush", "Bush Senior," "Bush 41," and even "Bush th ...

in 1988. Overall, the county long-term has been trending red since 1992.

Government

Montgomery County Officials

Ohio House of Representatives

Ohio State Senate

United States House of Representatives

United States Senate

Education

Post-secondary institutions

Public

Air Force Institute of Technology The Air Force Institute of Technology (AFIT) is a postgraduate institution and provider of professional and continuing education for the United States Armed Forces and is part of the United States Air Force. It is in Ohio at Wright-Patterson ...

(actually located in

Wright-Patterson AFB, Ohio Wright-Patterson Air Force Base (WPAFB) is a United States Air Force base and census-designated place just east of Dayton, Ohio, in Greene and Montgomery counties. It includes both Wright and Patterson Fields, which were originally Wilbur Wr ...

). * Sinclair Community College * Wright State University (actually located in neighboring

Greene County, Ohio Greene County is located in the southwestern portion of Ohio. As of the 2020 United States census, 2020 census, the population was 167,966. Its county seat is Xenia, Ohio, Xenia and its largest city is Beavercreek, Ohio, Beavercreek. The county ...

, but uses a

address).

Private

University of Dayton The University of Dayton (UD) is a Private university, private, Catholic research university in Dayton, Ohio, United States. Founded in 1850 by the Society of Mary (Marianists), Society of Mary, it is one of three Marianist universities in the U ...

* Kettering College of Medical Arts * The Miami Valley School

Public schools

The following public school districts are located partially or entirely in Montgomery County: * Local School Districts ** Brookville Local Schools *** Brookville High School, Brookville (the Blue Devils) ** Carlisle Local School District *** Carlisle High School, Carlisle (the Indians) ** Jefferson Township Local Schools *** Jefferson Township High School, Dayton (the Broncos) ** Mad River Local School District ** New Lebanon Local Schools *** Dixie High School, Dixie (the Greyhounds) ** Northmont City School District ** Northridge Local School District *** Northridge High School (the Polar Bears) ** Mad River Local Schools *** Walter E. Stebbins High School, Riverside (the Indians) ** Preble Shawnee Local School District ** Tri-County North Local School District ** Valley View Local Schools *** Valley View High School, Germantown (the Spartans) * City School Districts ** Beavercreek City School District ** Centerville City Schools *** Centerville High School, Centerville (the Elks) ** Dayton Public Schools *** Belmont High School for Computer Technology/Engineering, Dayton (the Bison) *** Thurgood Marshall High School for the Arts, Dayton (the Cougars) *** Dayton Early College Academy, Dayton *** Dunbar High School for Professional Studies, Dayton (the Wolverines) *** Meadowdale High School for Cultural Studies/International Baccalaureate, Dayton (the Lions) ***

Stivers School for the Arts Stivers School for the Arts is a magnet school in the Dayton Public Schools, Dayton City Schools in Dayton, Ohio, USA, in the St. Anne's Hill, Dayton, Ohio, St. Anne's Hill Historic District neighborhood. It is a public middle school, middle and h ...

, Dayton (Tigers) ** Fairborn City School District ** Huber Heights City Schools *** Wayne High School, Huber Heights (the Warriors) ** Kettering City School District *** Fairmont High School, Kettering (the Firebirds) **** (merger of the former Fairmont East and Fairmont West high schools (the East Falcons and the West Dragons) ** Miamisburg City Schools *** Miamisburg High School, Miamisburg (the Vikings) ** Northmont City Schools *** Northmont High School, Clayton (the Thunderbolts) ** Oakwood City School District *** Oakwood High School, Oakwood (the Lumberjacks) ** Springboro Community City School District ** Trotwood-Madison City Schools *** Trotwood-Madison High School, Trotwood (the Rams) ** Vandalia Butler City Schools *** Butler High School, Vandalia (the Aviators) ** West Carrollton Schools *** West Carrollton Senior High School, West Carrollton (the Pirates) There is also a public independent (not a part of any school district)

STEM Stem or STEM most commonly refers to: * Plant stem, a structural axis of a vascular plant * Stem group * Science, technology, engineering, and mathematics Stem or STEM can also refer to: Language and writing * Word stem, part of a word respon ...

school: * The Dayton Regional STEM School

Private schools

The following private high schools are located in Montgomery County: * Archbishop Alter High School, Kettering (the Knights) (

Roman Catholic The Catholic Church (), also known as the Roman Catholic Church, is the largest Christian church, with 1.27 to 1.41 billion baptized Catholics worldwide as of 2025. It is among the world's oldest and largest international institut ...

) *

Carroll High School Carroll High School can refer to: In the United States *Carroll High School (Alabama), Ozark, Alabama *Carroll High School (Flora, Indiana), Flora, Indiana *Carroll High School (Fort Wayne, Indiana), Fort Wayne, Indiana *Carroll High School (Iowa) ...

, Dayton (the Patriots) (Roman Catholic) * Chaminade Julienne High School, Dayton (Eagles) (Roman Catholic/ Marianist) * Dayton Christian High School, Dayton (the Warriors) (

nondenominational A non-denominational person or organization is one that does not follow (or is not restricted to) any particular or specific religious denomination. The term has been used in the context of various faiths, including Jainism, Baháʼí Faith, Zoro ...

Christian A Christian () is a person who follows or adheres to Christianity, a Monotheism, monotheistic Abrahamic religion based on the life and teachings of Jesus in Christianity, Jesus Christ. Christians form the largest religious community in the wo ...

) * Dominion Academy, Dayton (the Sabers) (Christ the King Anglican Church) * Miami Valley School, Dayton (the Rams) (

nonsectarian Nonsectarian institutions are secular institutions or other organizations not affiliated with or restricted to a particular religious group. Academic sphere Many North American universities identify themselves as being nonsectarian, such as B ...

)
Salem Christian Academy
Clayton * Spring Valley Academy, Centerville (

Seventh-day Adventist The Seventh-day Adventist Church (SDA) is an Adventist Protestant Christian denomination which is distinguished by its observance of Saturday, the seventh day of the week in the Christian (Gregorian) and the Hebrew calendar, as the Sabbat ...

)

Communities

Cities

* Brookville *

Carlisle Carlisle ( , ; from ) is a city in the Cumberland district of Cumbria, England. Carlisle's early history is marked by the establishment of a settlement called Luguvalium to serve forts along Hadrian's Wall in Roman Britain. Due to its pro ...

(mostly in Warren County) * Centerville (partly in Greene County) * Clayton *

(county seat) * Englewood * Germantown * Huber Heights (partly in Miami County) *

Kettering Kettering is a market town, market and industrial town, industrial town in the North Northamptonshire district of Northamptonshire, England, west of Cambridge, England, Cambridge, southwest of Peterborough, southeast of Leicester and north- ...

(partly in Greene County) * Miamisburg *

Moraine A moraine is any accumulation of unconsolidated debris (regolith and Rock (geology), rock), sometimes referred to as glacial till, that occurs in both currently and formerly glaciated regions, and that has been previously carried along by a gla ...

* Oakwood * Riverside * Springboro (mostly in Warren County) * Trotwood * Union (mostly in Montgomery County) * Vandalia * West Carrollton

Villages

* Farmersville * New Lebanon * Phillipsburg *

Verona Verona ( ; ; or ) is a city on the Adige, River Adige in Veneto, Italy, with 255,131 inhabitants. It is one of the seven provincial capitals of the region, and is the largest city Comune, municipality in the region and in Northeast Italy, nor ...

(mostly in Preble County)

Townships

Butler A butler is a person who works in a house serving and is a domestic worker in a large household. In great houses, the household is sometimes divided into departments, with the butler in charge of the dining room, wine cellar, and pantries, pantr ...

Clay Clay is a type of fine-grained natural soil material containing clay minerals (hydrous aluminium phyllosilicates, e.g. kaolinite, ). Most pure clay minerals are white or light-coloured, but natural clays show a variety of colours from impuriti ...

* German * Harrison * Jackson * Jefferson *

Miami Miami is a East Coast of the United States, coastal city in the U.S. state of Florida and the county seat of Miami-Dade County, Florida, Miami-Dade County in South Florida. It is the core of the Miami metropolitan area, which, with a populat ...

Perry Perry or pear cider is an alcoholic beverage made from fermented pears, traditionally in England (particularly Gloucestershire, Herefordshire, and Worcestershire), parts of South Wales, France (especially Normandy and Anjou), Canada, Austral ...

* Washington

Defunct townships

* Mad River (remnant merged with the Village of Riverside in 1994) * Madison (remnant merged with the Village of Trotwood in 1996) * Randolph (remnant merged with the Village of Clayton in 1998) * Van Buren (partitioned between the municipalities of

and

in 1952–1953) * Wayne (incorporated as Huber Heights in 1981)

Census-designated place

* Drexel * Fort McKinley * Shiloh

Unincorporated communities

* Airhill * Amity * Arlington * Bachman *

Chautauqua Chautauqua ( ) is an adult education and social movement in the United States that peaked in popularity in the late 19th and early 20th centuries. Chautauqua assemblies expanded and spread throughout rural America until the mid-1920s. The Cha ...

* Dodson * Harries * Kinsey *

Liberty Liberty is the state of being free within society from oppressive restrictions imposed by authority on one's way of life, behavior, or political views. The concept of liberty can vary depending on perspective and context. In the Constitutional ...

* Little York * Miami Villa * Morgan Place * New Chicago * Northridge * Pyrmont * Spanker * Taylorsburg * Woodbourne-Hyde Park

References

External links

Montgomery County Government's website

Montgomery County Public Records Online
{{authority control 1803 establishments in Ohio Populated places established in 1803 World War II Heritage Cities