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Rock Island County, Illinois

From Wikipedia, the free encyclopedia

Rock Island County
Rock Island County Justice Center
Rock Island County Justice Center
Official logo of Rock Island County
Map of Illinois highlighting Rock Island County
Location within the U.S. state of Illinois
Map of the United States highlighting Illinois
Illinois's location within the U.S.
Coordinates: 41°28′N 90°34′W / 41.47°N 90.57°W / 41.47; -90.57
Country United States
State Illinois
Founded1831
Named forRock (Arsenal) Island
SeatRock Island
Largest cityMoline
Area
 • Total451 sq mi (1,170 km2)
 • Land428 sq mi (1,110 km2)
 • Water24 sq mi (60 km2)  5.2%
Population
 (2010)
 • Total147,546
 • Estimate 
(2019)
141,879
 • Density330/sq mi (130/km2)
Time zoneUTC−6 (Central)
 • Summer (DST)UTC−5 (CDT)
Congressional district17th
Websitewww.co.rock-island.il.us

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 2010 census, it had a population of 147,546.[1] Its county seat is Rock Island; its largest city is neighboring Moline.[2] Rock Island County is one of the four counties that make up the Davenport-Moline-Rock Island, IA-IL Metropolitan Statistical Area.[3]

History

Rock Island County at the time of its creation in 1831
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.[4] The Rock River (which the Sauk and Fox Indians called Sinnissippi meaning "rocky waters")[5] 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 451 square miles (1,170 km2), of which 428 square miles (1,110 km2) is land and 24 square miles (62 km2) (5.2%) is water.[6]

Climate and weather

Rock Island, Illinois
Climate chart (explanation)
J
F
M
A
M
J
J
A
S
O
N
D
 
 
1.3
 
 
30
13
 
 
1.4
 
 
36
19
 
 
2.6
 
 
48
29
 
 
3.6
 
 
61
41
 
 
4.4
 
 
72
52
 
 
4.8
 
 
81
63
 
 
3
 
 
85
68
 
 
4.3
 
 
83
66
 
 
2.9
 
 
76
57
 
 
2.4
 
 
65
45
 
 
2.5
 
 
48
32
 
 
1.9
 
 
35
20
Average max. and min. temperatures in °F
Precipitation totals in inches
Source: The Weather Channel[7]

In recent years, average temperatures in the county seat of Rock Island have ranged from a low of 13 °F (−11 °C) in January to a high of 85 °F (29 °C) in July, although a record low of −22 °F (−30 °C) was recorded in February 1996 and a record high of 103 °F (39 °C) was recorded in July 2006. Average monthly precipitation ranged from 1.28 inches (33 mm) in January to 4.75 inches (121 mm) in June.[7]

Major highways

Adjacent counties

National protected area

Demographics

Historical population
Census Pop.
18402,610
18506,937165.8%
186021,005202.8%
187029,78341.8%
188038,30228.6%
189041,9179.4%
190055,24931.8%
191070,40427.4%
192092,29731.1%
193098,1916.4%
1940113,32315.4%
1950133,55817.9%
1960150,99113.1%
1970166,73410.4%
1980165,968−0.5%
1990148,723−10.4%
2000149,3740.4%
2010147,546−1.2%
2020144,672−1.9%
U.S. Decennial Census[8]
1790-1960[9] 1900-1990[10]
1990-2000[11] 2010-2019[1]

As of the 2010 United States Census, there were 147,546 people, 61,303 households, and 38,384 families residing in the county.[12] The population density was 345.0 inhabitants per square mile (133.2/km2). There were 65,756 housing units at an average density of 153.8 per square mile (59.4/km2).[6] 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.[12] 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.[13]

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.[12]

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.[14]

Economy

At one time Mississippi Valley Airlines had its headquarters in Quad City Airport in the county.[15] John Deere is headquartered in Moline.[16]

Communities

Cities

Villages

Census-designated places

Unincorporated communities

Townships

Rock Island County is divided into eighteen townships:

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.[17]

United States presidential election results for Rock Island County, Illinois[18]
Year Republican Democratic Third party
No.  % No.  % No.  %
2020 28,603 42.85% 36,691 54.96% 1,464 2.19%
2016 26,998 42.19% 32,298 50.47% 4,698 7.34%
2012 24,934 38.23% 39,157 60.04% 1,126 1.73%
2008 25,364 36.97% 42,210 61.52% 1,034 1.51%
2004 29,663 42.39% 39,880 56.99% 429 0.61%
2000 25,194 38.70% 37,957 58.31% 1,944 2.99%
1996 20,626 33.84% 34,822 57.13% 5,507 9.03%
1992 23,212 32.22% 37,412 51.93% 11,415 15.85%
1988 27,412 40.37% 40,174 59.17% 315 0.46%
1984 35,121 46.41% 40,208 53.13% 343 0.45%
1980 34,788 48.47% 30,045 41.86% 6,942 9.67%
1976 34,007 47.72% 35,994 50.51% 1,260 1.77%
1972 37,548 53.39% 32,529 46.25% 253 0.36%
1968 30,404 43.35% 34,506 49.20% 5,230 7.46%
1964 23,714 36.22% 41,759 63.78% 0 0.00%
1960 32,534 48.96% 33,812 50.88% 108 0.16%
1956 31,342 51.72% 29,145 48.09% 118 0.19%
1952 32,933 54.07% 27,879 45.77% 100 0.16%
1948 22,192 47.01% 24,542 51.98% 477 1.01%
1944 23,980 44.19% 30,102 55.48% 180 0.33%
1940 25,629 41.95% 35,240 57.67% 232 0.38%
1936 19,487 36.75% 32,741 61.74% 799 1.51%
1932 21,205 45.55% 24,676 53.01% 668 1.44%
1928 27,246 65.22% 14,334 34.31% 196 0.47%
1924 20,563 57.69% 3,631 10.19% 11,453 32.13%
1920 21,908 71.32% 5,208 16.95% 3,603 11.73%
1916 16,169 53.17% 10,914 35.89% 3,327 10.94%
1912 6,506 42.55% 3,997 26.14% 4,786 31.30%
1908 8,196 55.45% 4,739 32.06% 1,846 12.49%
1904 8,152 61.74% 2,156 16.33% 2,895 21.93%
1900 8,299 61.22% 4,786 35.31% 471 3.47%
1896 7,323 60.07% 4,692 38.49% 176 1.44%
1892 5,052 52.38% 4,034 41.82% 559 5.80%


See also

Footnotes

  1. ^ a b "State & County QuickFacts". United States Census Bureau. Archived from the original on June 7, 2011. Retrieved July 8, 2014.
  2. ^ "Find a County". National Association of Counties. Archived from the original on May 31, 2011. Retrieved June 7, 2011.
  3. ^ United States Office of Management and Budget. "Update of Statistical Area Definitions and Guidance on Their Uses" (PDF). pp. 5, 36. Archived from the original (PDF) on May 14, 2006. Retrieved July 21, 2006.
  4. ^ Rock Island, the island, History: Introduction Archived January 14, 2009, at the Wayback Machine, US Army Corps of Engineers
  5. ^ "Castle Rock State Park". Illinois DNR. Archived from the original on April 1, 2007. Retrieved August 3, 2014.
  6. ^ a b "Population, Housing Units, Area, and Density: 2010 - County". United States Census Bureau. Archived from the original on February 12, 2020. Retrieved July 12, 2015.
  7. ^ a b "Monthly Averages for Rock Island, Illinois". The Weather Channel. Archived from the original on November 12, 2009. Retrieved January 27, 2011.
  8. ^ "U.S. Decennial Census". United States Census Bureau. Retrieved July 8, 2014.
  9. ^ "Historical Census Browser". University of Virginia Library. Archived from the original on August 11, 2012. Retrieved July 8, 2014.
  10. ^ "Population of Counties by Decennial Census: 1900 to 1990". United States Census Bureau. Archived from the original on April 24, 2014. Retrieved July 8, 2014.
  11. ^ "Census 2000 PHC-T-4. Ranking Tables for Counties: 1990 and 2000" (PDF). United States Census Bureau. Archived (PDF) from the original on December 18, 2014. Retrieved July 8, 2014.
  12. ^ a b c "DP-1 Profile of General Population and Housing Characteristics: 2010 Demographic Profile Data". United States Census Bureau. Archived from the original on February 13, 2020. Retrieved July 12, 2015.
  13. ^ "DP02 SELECTED SOCIAL CHARACTERISTICS IN THE UNITED STATES – 2006-2010 American Community Survey 5-Year Estimates". United States Census Bureau. Archived from the original on February 13, 2020. Retrieved July 12, 2015.
  14. ^ "DP03 SELECTED ECONOMIC CHARACTERISTICS – 2006-2010 American Community Survey 5-Year Estimates". United States Census Bureau. Archived from the original on February 13, 2020. Retrieved July 12, 2015.
  15. ^ "World Airline Directory." Flight International. March 30, 1985. 98 Archived February 23, 2013, at the Wayback Machine. "Head Office: PO Box 949, Quad City Airport, Moline, Illinois 61265, USA."
  16. ^ "Deere & Company World Headquarters". Retrieved March 21, 2019.
  17. ^ "Rock Island County Clerk - Elections - Previous Election Results".
  18. ^ Leip, David. "Dave Leip's Atlas of U.S. Presidential Elections". uselectionatlas.org. Archived from the original on March 23, 2018. Retrieved May 6, 2018.

Further reading

External links

This page was last edited on 8 July 2022, at 00:34
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