Rock Island County, Illinois

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Template:Short description Template:Redirect-distinguish Template:Use American English Template:Use mdy dates Template:Infobox U.S. county

Rock Island County is a county located in the U.S. state of Illinois, bounded on the west by the Mississippi River. According to the 2020 census, it had a population of 144,672.<ref>Template:Cite web</ref> Its county seat is Rock Island; its largest city is neighboring Moline.<ref name="GR6">Template:Cite web</ref> Rock Island County is one of the four counties that make up the Davenport-Moline-Rock Island, IA-IL Metropolitan Statistical Area.<ref>Template:Cite web</ref>

History

File:Rock Island County Illinois 1831.png
Rock Island County at the time of its creation in 1831

Rock Island County was formed in 1831 out of Jo Daviess County. It was named for Rock Island, an island in the Mississippi River now known as Arsenal Island.<ref>Rock Island, the island, History: Introduction Template:Webarchive, US Army Corps of Engineers</ref> The Rock River (which the Sauk and Meskwaki peoples called Sinnissippi, meaning "rocky waters")<ref>Template:Cite web</ref> 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 are upriver at Sterling in Whiteside County.

Geography

According to the U.S. Census Bureau, the county has a total area of Template:Convert, of which Template:Convert is land and Template:Convert (5.2%) is water.<ref name="census-density" />

Climate and weather

Template:Climate chart In recent years, average temperatures in the county seat of Rock Island have ranged from a low of Template:Convert in January to a high of Template:Convert in July, although a record low of Template:Convert was recorded in February 1996 and a record high of Template:Convert was recorded in July 2006. Average monthly precipitation ranged from Template:Convert in January to Template:Convert in June.<ref name="weather" />

Major highways

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Transit

Adjacent counties

National protected area

Demographics

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2020 census

Rock Island County, Illinois – Racial and ethnic composition
Template:Nobold
Race / Ethnicity (NH = Non-Hispanic) Pop 1980<ref name=1980Census>Template:Cite web</ref> Pop 1990<ref name=1990Census>Template:Cite web</ref> Pop 2000<ref name=2000CensusP004>Template:Cite web</ref> Pop 2010<ref name=2010CensusP2>Template:Cite web</ref> Pop 2020<ref name=2020CensusP2>Template:Cite web</ref> % 1980 % 1990 % 2000 % 2010 % 2020
White alone (NH) 147,393 128,986 121,705 111,764 97,689 88.81% 86.73% 81.48% 75.75% 67.52%
Black or African American alone (NH) 9,710 10,290 11,099 12,911 16,169 5.85% 6.92% 7.43% 8.75% 11.18%
Native American or Alaska Native alone (NH) 257 301 288 283 240 0.15% 0.20% 0.19% 0.19% 0.17%
Asian alone (NH) 889 980 1,499 2,383 4,033 0.54% 0.66% 1.00% 1.62% 2.79%
Native Hawaiian or Pacific Islander alone (NH) x <ref>included in the Asian category in the 1980 Census</ref> x <ref>included in the Asian category in the 1990 Census</ref> 34 44 35 x x 0.02% 0.03% 0.02%
Other race alone (NH) 510 82 109 135 482 0.31% 0.06% 0.07% 0.09% 0.33%
Mixed race or Multiracial (NH) x <ref>not an option in the 1980 Census</ref> x <ref>not an option in the 1990 Census</ref> 1,849 2,908 6,182 x x 1.24% 1.97% 4.27%
Hispanic or Latino (any race) 7,209 8,084 12,791 17,118 19,842 4.34% 5.44% 8.56% 11.60% 13.72%
Total 165,968 148,723 149,374 147,546 144,672 100.00% 100.00% 100.00% 100.00% 100.00%

2010 census

As of the 2010 United States census, there were 147,546 people, 61,303 households, and 38,384 families residing in the county.<ref name="census-dp1">Template:Cite web</ref> The population density was Template:Convert. There were 65,756 housing units at an average density of Template:Convert.<ref name="census-density">Template:Cite web</ref> 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.<ref name="census-dp1" /> In terms of ancestry, 25.9% were German, 14.2% were Irish, 8.7% were English, 6.8% were Swedish, and 5.2% were American.<ref name="census-dp2">Template:Cite web</ref>

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.<ref name="census-dp1" />

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, including 19.0% of those under age 18 and 7.1% of those age 65 or over.<ref name="census-dp3">Template:Cite web</ref>

Economy

At one time Mississippi Valley Airlines had its headquarters in Quad City Airport in the county.<ref>"World Airline Directory." Flight International. March 30, 1985. 98 Template:Webarchive. "Head Office: PO Box 949, Quad City Airport, Moline, Illinois 61265, USA."</ref> John Deere is headquartered in Moline.<ref>Template:Cite web</ref>

Communities

Cities

Villages

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Census-designated places

Townships

Rock Island County is divided into eighteen townships:

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Forts

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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 managed to keep Hillary Clinton to a single-digit margin of victory, the first Republican to do so since Ronald Reagan 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.<ref>Template:Cite web</ref> Template:PresHead Template:PresRow Template:PresRow Template:PresRow Template:PresRow Template:PresRow Template:PresRow Template:PresRow Template:PresRow Template:PresRow Template:PresRow Template:PresRow Template:PresRow Template:PresRow Template:PresRow Template:PresRow Template:PresRow Template:PresRow Template:PresRow Template:PresRow Template:PresRow Template:PresRow Template:PresRow Template:PresRow Template:PresRow Template:PresRow Template:PresRow Template:PresRow Template:PresRow Template:PresRow Template:PresRow Template:PresRow Template:PresRow Template:PresRow Template:PresRow Template:PresFoot

Education

K-12 school districts include:<ref name=CensusSDMap2020>Template:Cite map - Text list</ref> Template:Div col

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There is one secondary school district: United Township High School District 30.<ref name=CensusSDMap2020/>

Elementary school districts include:<ref name=CensusSDMap2020/> Template:Div col

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See also

Footnotes

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Further reading

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Template:Rock Island County, Illinois Template:Quad Cities Template:US state navigation box Template:Authority control Template:Coord

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