Rock Island County is a

county A county is a geographic region of a country used for administrative or other purposesChambers Dictionary, L. Brookes (ed.), 2005, Chambers Harrap Publishers Ltd, Edinburgh in certain modern nations. The term is derived from the Old French ...

located in 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 sover ...

Illinois Illinois ( ) is a U.S. state, state in the Midwestern United States, Midwestern United States. Its largest metropolitan areas include the Chicago metropolitan area, and the Metro East section, of Greater St. Louis. Other smaller metropolita ...

, bounded on the west by the

Mississippi River The Mississippi River is the second-longest river and chief river of the second-largest drainage system in North America, second only to the Hudson Bay drainage system. From its traditional source of Lake Itasca in northern Minnesota, it f ...

. According to the 2010 census, it had a population of 147,546. Its

county seat A county seat is an administrative center, seat of government, or capital city of a county or civil parish. The term is in use in Canada, China, Hungary, Romania, Taiwan, and the United States. The equivalent term shire town is used in the US st ...

is Rock Island; its largest city is neighboring Moline. Rock Island County is one of the four counties that make up the Davenport- Moline-Rock Island, IA-IL

Metropolitan Statistical Area In the United States, a metropolitan statistical area (MSA) is a geographical region with a relatively high population density at its core and close economic ties throughout the area. Such regions are neither legally Incorporated town, incorporate ...

History

Rock Island County was formed in 1831 out of

Jo Daviess County Jo Daviess County () is the northwesternmost county in the U.S. state of Illinois. According to the 2010 census, it had a population of 22,678. Its county seat is Galena. Jo Daviess County is part of the Tri-State Area and is located near D ...

. It was named for Rock Island, an island in the

now known as

Arsenal Island An arsenal is a place where weapon, arms and ammunition are made, maintenance, repair, and operations, maintained and repaired, stored, or issued, in any combination, whether Private property, privately or state-owned, publicly owned. Arse ...

. The Rock River (which the Sauk and

Fox Foxes are small to medium-sized, omnivorous mammals belonging to several genera of the family Canidae. They have a flattened skull, upright, triangular ears, a pointed, slightly upturned snout, and a long bushy tail (or ''brush''). Twelve sp ...

Indians called Sinnissippi meaning "rocky waters") flows from Whiteside County and points further east and north and joins the Mississippi River at Rock Island. The Sinnissippi Mounds, dating from the Hopewell period and on the

National Register of Historic Places The National Register of Historic Places (NRHP) is the United States federal government's official list of districts, sites, buildings, structures and objects deemed worthy of preservation for their historical significance or "great artistic v ...

are upriver at Sterling in Whiteside County.

Geography

According to the

U.S. Census Bureau The United States Census Bureau (USCB), officially the Bureau of the Census, is a principal agency of the U.S. Federal Statistical System, responsible for producing data about the American people and economy. The Census Bureau is part of the ...

, the county has a total area of , of which is land and (5.2%) is water.

Climate and weather

In recent years, average temperatures in the county seat of Rock Island have ranged from a low of in January to a high of in July, although a record low of was recorded in February 1996 and a record high of was recorded in July 2006. Average monthly precipitation ranged from in January to in June.

Major highways

Interstate 74 } Interstate 74 (I-74) is an Interstate Highway in the Midwestern and Southeastern United States. Its western end is at an interchange with I-80 in Davenport, Iowa (Quad Cities); the eastern end of its Midwest segment is at an interchange ...

Interstate 80 Interstate 80 (I-80) is an east–west transcontinental freeway that crosses the United States from downtown San Francisco, California, to Teaneck, New Jersey, in the New York metropolitan area. The highway was designated in 1956 as one o ...

* Interstate 88 * Interstate 280 *

U.S. Highway 6 U.S. Route 6 (US 6), also called the Grand Army of the Republic Highway, honoring the American Civil War Grand Army of the Republic, veterans association, is a main route of the U.S. Highway system. While it currently runs east-northeast fr ...

* U.S. Highway 67 *

U.S. Highway 150 U.S. Route 150 (US 150) is a 571-mile (919 km) long northwest-southeast United States highway, signed as east–west. It runs from U.S. Route 6 outside of Moline, Illinois to U.S. Route 25 in Mount Vernon, Kentucky. Route description ...

Illinois Route 2 Illinois Route 2 (IL 2) is a north–south state highway in northern Illinois. It currently starts at Illinois Route 40 in Sterling and ends at the Wisconsin state line in South Beloit, very near the intersection with U.S. Route 51, Illinois ...

(formerly) *

Illinois Route 5 Illinois Route 5 (IL 5) is a four-lane road in Rock Island County, Illinois, United States, that runs from U.S. Route 67 (US 67) in Rock Island to the interchange of Interstate 80 (I-80) and the toll-free portion of I-88, a distance ...

Illinois Route 84 Illinois Route 84 (Route 84 or IL 84) is a long state highway that runs along the Mississippi River in northwestern Illinois. Illinois 84 runs from south of Green Rock (now Colona) at U.S. Route 6 to the Wisconsin state line at Highway 80 by H ...

Illinois Route 92 Illinois Route 92 (IL 92 or Route 92) is an east–west state highway in northwest Illinois. It runs from the Norbert F. Beckey Bridge across the Mississippi River where it meets the eastern end of Iowa Highway 92, east to U.S. Route 34 ...

Illinois Route 94 Illinois Route 94 is a north–south state highway in western Illinois. It runs from U.S. Route 24 (US 24) just east of Camp Point to U.S. Route 67 just south of Oak Grove, just south of the Quad Cities area. This is a distance of . ...

Illinois Route 110 110 may refer to: *110 (number), natural number *AD 110, a year *110 BC, a year *110 film, a cartridge-based film format used in still photography *110 (MBTA bus), Massachusetts Bay Transportation Authority bus route *110 (song), 2019 song by Capi ...

Illinois Route 192 Illinois Route 192 is a east–west state highway in northwest Illinois. It runs from its western terminus at Illinois Route 92 northwest of Edgington to its eastern terminus at Illinois Route 94 in Taylor Ridge. The route is located entire ...

Transit

Quad Cities MetroLINK The Quad Cities MetroLINK, officially the Rock Island County Metropolitan Mass Transit District, provides mass transportation for the Illinois half of the Quad Cities metro area. Both Iowa cities that make up the region have their own systems, but ...

List of intercity bus stops in Illinois The following is a list of presently operating intercity bus stops in Illinois with regular service. The list excludes charter buses, local transit buses, paratransit systems, and trolleybus systems. The following companies provide intercity bus se ...

Adjacent counties

Clinton County Clinton County may refer to: *Counties named for George Clinton, first and third Governor of New York, and later the fourth Vice President of the United States: **Clinton County, New York ** Clinton County, Ohio *Counties named for DeWitt Clinton, ...

Iowa Iowa () is a state in the Midwestern region of the United States, bordered by the Mississippi River to the east and the Missouri River and Big Sioux River to the west. It is bordered by six states: Wisconsin to the northeast, Illinois to the ...

(north) * Whiteside County (northeast) * Henry County (southeast) * Mercer County (south) * Louisa County,

(southwest) * Muscatine County,

(west) * Scott County,

(northwest)

National protected area

Upper Mississippi River National Wildlife and Fish Refuge The Upper Mississippi River National Wildlife and Fish Refuge is a ,2010 United States Census The United States census of 2010 was the twenty-third United States national census. National Census Day, the reference day used for the census, was April 1, 2010. The census was taken via mail-in citizen self-reporting, with enumerators servin ...

, there were 147,546 people, 61,303 households, and 38,384 families residing in the county. The population density was . There were 65,756 housing units at an average density of . The racial makeup of the county was 81.6% white, 9.0% black or African American, 1.6% Asian, 0.3% American Indian, 4.4% from other races, and 3.0% from two or more races. Those of Hispanic or Latino origin made up 11.6% of the population. In terms of ancestry, 25.9% were

German German(s) may refer to: * Germany (of or related to) ** Germania (historical use) * Germans, citizens of Germany, people of German ancestry, or native speakers of the German language ** For citizens of Germany, see also German nationality law **Ge ...

, 14.2% were

Irish Irish may refer to: Common meanings * Someone or something of, from, or related to: ** Ireland, an island situated off the north-western coast of continental Europe ***Éire, Irish language name for the isle ** Northern Ireland, a constituent unit ...

, 8.7% were

English English usually refers to: * English language * English people English may also refer to: Peoples, culture, and language * ''English'', an adjective for something of, from, or related to England ** English national ide ...

, 6.8% were

Swedish Swedish or ' may refer to: Anything from or related to Sweden, a country in Northern Europe. Or, specifically: * Swedish language, a North Germanic language spoken primarily in Sweden and Finland ** Swedish alphabet, the official alphabet used by ...

, and 5.2% were

American American(s) may refer to: * American, something of, from, or related to the United States of America, commonly known as the "United States" or "America" ** Americans, citizens and nationals of the United States of America ** American ancestry, pe ...

. Of the 61,303 households, 29.0% had children under the age of 18 living with them, 45.3% were married couples living together, 12.7% had a female householder with no husband present, 37.4% were non-families, and 31.6% of all households were made up of individuals. The average household size was 2.34 and the average family size was 2.93. The median age was 40.0 years. The median income for a household in the county was $46,226 and the median income for a family was $58,962. Males had a median income of $42,548 versus $31,917 for females. The per capita income for the county was $25,071. About 8.7% of families and 12.3% 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 t ...

, including 19.0% of those under age 18 and 7.1% of those age 65 or over.

Economy

At one time

Mississippi Valley Airlines Mississippi Valley Airlines (IATA--XV) was a regional air carrier serving the Upper Midwestern region of the United States. It was founded by Herb Lee, Norm Elsy and Charles A. ("Chuck") Draine as Gateway Aviation, and had its headquarters in L ...

had its headquarters in Quad City Airport in the county.

John Deere Deere & Company, doing business as John Deere (), is an American corporation that manufactures agricultural machinery, heavy equipment, forestry machinery, diesel engines, drivetrains (axles, transmissions, gearboxes) used in heavy equipment, ...

is headquartered in Moline.

Communities

Cities

* East Moline * Moline * Rock Island * Silvis

Villages

Andalusia Andalusia (, ; es, Andalucía ) is the southernmost Autonomous communities of Spain, autonomous community in Peninsular Spain. It is the most populous and the second-largest autonomous community in the country. It is officially recognised as a ...

* Carbon Cliff * Coal Valley (part) * Cordova *

Hampton Hampton may refer to: Places Australia *Hampton bioregion, an IBRA biogeographic region in Western Australia *Hampton, New South Wales *Hampton, Queensland, a town in the Toowoomba Region * Hampton, Victoria Canada * Hampton, New Brunswick *Ha ...

* Hillsdale *

Milan Milan ( , , Lombard: ; it, Milano ) is a city in northern Italy, capital of Lombardy, and the second-most populous city proper in Italy after Rome. The city proper has a population of about 1.4 million, while its metropolitan city h ...

* Oak Grove * Port Byron * Rapids City *

Reynolds Reynolds may refer to: Places Australia *Hundred of Reynolds, a cadastral unit in South Australia *Hundred of Reynolds (Northern Territory), a cadastral unit in the Northern Territory of Australia United States * Reynolds, Mendocino County, Calif ...

(part)

Census-designated places

* Coyne Center *

Rock Island Arsenal The Rock Island Arsenal comprises , located on Arsenal Island, originally known as Rock Island, on the Mississippi River between the cities of Davenport, Iowa, and Rock Island, Illinois. It lies within the state of Illinois. Rock Island ...

Unincorporated communities

* Barstow * Buffalo Prairie * Campbell's Island * Edgington * Illinois City * Joslin * Taylor Ridge

Townships

Rock Island County is divided into eighteen

townships A township is a kind of human settlement or administrative subdivision, with its meaning varying in different countries. Although the term is occasionally associated with an urban area, that tends to be an exception to the rule. In Australia, Ca ...

: *

Blackhawk Black Hawk and Blackhawk may refer to: Animals * Black Hawk (horse), a Morgan horse that lived from 1833 to 1856 * Common black hawk, ''Buteogallus anthracinus'' * Cuban black hawk, ''Buteogallus gundlachii'' * Great black hawk, ''Buteogallus uru ...

Bowling Bowling is a target sport and recreational activity in which a player rolls a ball toward pins (in pin bowling) or another target (in target bowling). The term ''bowling'' usually refers to pin bowling (most commonly ten-pin bowling), though ...

* Buffalo Prairie * Canoe Creek * Coal Valley * Coe * Cordova * Drury * Edgington *

* Moline * Port Byron * Rock Island *

Rural In general, a rural area or a countryside is a geographic area that is located outside towns and cities. Typical rural areas have a low population density and small settlements. Agricultural areas and areas with forestry typically are describ ...

* South Moline * South Rock Island * Zuma

Forts

Fort Armstrong A fortification is a military construction or building designed for the defense of territories in warfare, and is also used to establish rule in a region during peacetime. The term is derived from Latin ''fortis'' ("strong") and ''facere'' ...

Politics

Before 1932, Rock Island County was a Republican stronghold in presidential elections, backing the party's candidate in every election from 1892 to 1928. From 1932 on, it has consistently backed Democratic Party presidential candidates, except for the national Republican landslides of 1952, 1956, 1972, and 1980. In 2016,

Donald Trump Donald John Trump (born June 14, 1946) is an American politician, media personality, and businessman who served as the 45th president of the United States from 2017 to 2021. Trump graduated from the Wharton School of the University of Pe ...

managed to keep

Hillary Clinton Hillary Diane Rodham Clinton ( Rodham; born October 26, 1947) is an American politician, diplomat, and former lawyer who served as the 67th United States Secretary of State for President Barack Obama from 2009 to 2013, as a United States sen ...

to a single-digit margin of victory, the first Republican to do so since

Ronald Reagan Ronald Wilson Reagan ( ; February 6, 1911June 5, 2004) was an American politician, actor, and union leader who served as the 40th president of the United States from 1981 to 1989. He also served as the 33rd governor of California from 1967 ...

in 1984; in 2020, Joe Biden increased the Democratic margin from 8.3% to 12.1%. Due to the dominance of the Democratic Party in county politics, Rock Island County remains one of the most Democratic counties outside of the Chicago area in Illinois. Since 2010 the Republican Party began making inroads in county politics, gaining a few seats on the Democratic-dominated county board; however, since 2018, the Republican Party influence on the board has begun to decrease as the county resumed heavy Democratic voting.

Footnotes

External links

Official county website

Rock Island County Historical Society
{{Coord, 41.47, -90.57, display=title, type:adm2nd_region:US-IL_source:UScensus1990 Illinois counties 1831 establishments in Illinois Populated places established in 1831 Quad Cities Illinois counties on the Mississippi River