County in Illinois, United States
County in Illinois
Clinton County is acounty located in the U.S. state ofIllinois . At the2020 census , the population was 36,899.[ 2] county seat isCarlyle .[ 3] United States Census Bureau placed themean center of U.S. population in Clinton County.[ 4] St. Louis ,MO -ILMetropolitan Statistical Area .
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In 1805, prior to the establishment of the county, theterritorial government established apost road from its capital (Vincennes, Indiana ) toSt. Louis, Missouri , passing through the county.[ 5]
In 1808 a wagon road was laid out through the future Clinton County. It extended from theGoshen Settlement to the Ohiosalt works and crossed theKaskaskia River at Carlyle.[ 6] [ 7]
Clinton County was created on December 27, 1824, from portions ofWashington ,Fayette , andBond Counties . It was named for the seventhgovernor of New York ,DeWitt Clinton , who helped build theErie Canal .[ 8] [ 9]
Crossing the Kaskaskia became much easier when the bridge now known as theGeneral Dean Suspension Bridge was built in 1859, at a cost of $40,000.[ 10] [ 11] [ 12] Illinois General Assembly set aside $20,000 for bridge restoration in 1951, and in 1953 the bridge was named afterWilliam F. Dean .[ 10]
According to the U.S.Census Bureau , the county has a total area of 503 square miles (1,300 km2 ), of which 474 square miles (1,230 km2 ) is land and 29 square miles (75 km2 ) (5.8%) is water.[ 13] Eldon Hazlet State Recreation Area andSouth Shore State Park are in Clinton County. Its southern border is theKaskaskia River .
Climate and weather [ edit ] Carlyle, Illinois Climate chart (explanation ) J
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In recent years, average temperatures in the county seat of Carlyle have ranged from a low of 19 °F (−7 °C) in January to a high of 88 °F (31 °C) in July, although a record low of −22 °F (−30 °C) was recorded in January 1994 and a record high of 104 °F (40 °C) was recorded in July 1980. Average monthly precipitation ranged from 2.17 inches (55 mm) in January to 4.44 inches (113 mm) in June.[ 14]
2000 census age pyramid for Clinton County Historical population Census Pop. Note %± 1830 2,330 — 1840 3,718 59.6% 1850 5,139 38.2% 1860 10,941 112.9% 1870 16,285 48.8% 1880 18,714 14.9% 1890 17,411 −7.0% 1900 19,824 13.9% 1910 22,832 15.2% 1920 22,947 0.5% 1930 21,369 −6.9% 1940 22,912 7.2% 1950 22,594 −1.4% 1960 24,029 6.4% 1970 28,315 17.8% 1980 32,617 15.2% 1990 33,944 4.1% 2000 35,535 4.7% 2010 37,762 6.3% 2020 36,899 −2.3% 2024 (est.) 37,087 [ 15] 0.5% US Decennial Census[ 16] [ 17] [ 18] [ 19] [ 20]
Clinton County, Illinois – Racial and ethnic composition Note: the US Census treats Hispanic/Latino as an ethnic category. This table excludes Latinos from the racial categories and assigns them to a separate category. Hispanics/Latinos may be of any race. Race / Ethnicity(NH = Non-Hispanic ) Pop 1980[ 21] Pop 1990[ 22] Pop 2000[ 23] Pop 2010[ 24] Pop 2020[ 25] % 1980 % 1990 % 2000 % 2010 % 2020 White alone (NH)31,992 32,447 33,220 34,766 32,845 98.08% 95.59% 93.49% 92.07% 89.01% Black or African American alone (NH)309 1,013 1,389 1,323 1,140 0.95% 2.98% 3.91% 3.50% 3.09% Native American orAlaska Native alone (NH)31 43 49 80 80 0.10% 0.13% 0.14% 0.21% 0.22% Asian alone (NH)91 98 115 167 175 0.28% 0.29% 0.32% 0.44% 0.47% Native Hawaiian orPacific Islander alone (NH)x[ 26] x[ 27] 8 11 5 x x 0.02% 0.03% 0.01% Other race alone (NH)10 7 17 17 93 0.03% 0.02% 0.05% 0.05% 0.25% Mixed race or Multiracial (NH)x[ 28] x[ 29] 167 340 1,174 x x 0.47% 0.90% 3.18% Hispanic or Latino (any race)184 336 570 1,058 1,387 0.56% 0.99% 1.60% 2.80% 3.76% Total 32,617 33,944 35,535 37,762 36,899 100.00% 100.00% 100.00% 100.00% 100.00%
As of the2010 United States census , there were 37,762 people, 14,005 households, and 9,760 families residing in the county.[ 30] 2 ). There were 15,311 housing units at an average density of 32.3 per square mile (12.5/km2 ).[ 13] German , 9.8% wereIrish , 5.8% wereEnglish , and 5.6% wereAmerican .[ 31]
Of the 14,005 households, 32.7% had children under the age of 18 living with them, 56.5% were married couples living together, 8.7% had a female householder with no husband present, 30.3% were non-families, and 25.1% of all households were made up of individuals. The average household size was 2.55 and the average family size was 3.02. The median age was 39.3 years.
The median income for a household in the county was $55,278 and the median income for a family was $66,682. Males had a median income of $45,119 versus $34,051 for females. The per capita income for the county was $25,392. About 5.2% of families and 7.8% of the population were below thepoverty line , including 9.2% of those under age 18 and 5.7% of those age 65 or over.[ 32]
Carlyle Community Unit School District 1 Patoka Community Unit School District 100 Sandoval Community Unit School District 501 Wesclin Community Unit School District 3 Central Community High School, Breese Mater Dei Catholic High School, Breese Unincorporated communities [ edit ] As of February 2025, the county is one of seven that voted to join the state of Indiana.[ 33]
United States presidential election results for Clinton County, Illinois[ 34] Year Republican Democratic Third party(ies) No. % No. % No. % 1892 1,361 34.68% 2,393 60.97% 171 4.36% 1896 1,863 41.75% 2,572 57.64% 27 0.61% 1900 1,964 41.60% 2,637 55.86% 120 2.54% 1904 1,848 43.02% 2,153 50.12% 295 6.87% 1908 2,104 39.11% 3,016 56.06% 260 4.83% 1912 973 20.48% 2,674 56.29% 1,103 23.22% 1916 3,423 42.59% 4,201 52.27% 413 5.14% 1920 4,564 63.71% 1,661 23.19% 939 13.11% 1924 2,358 29.69% 1,693 21.32% 3,891 48.99% 1928 3,031 30.77% 6,774 68.76% 47 0.48% 1932 2,548 24.35% 7,736 73.92% 182 1.74% 1936 3,653 32.78% 5,355 48.05% 2,137 19.17% 1940 7,582 62.00% 4,558 37.27% 90 0.74% 1944 6,753 62.82% 3,944 36.69% 53 0.49% 1948 5,128 51.47% 4,773 47.91% 62 0.62% 1952 6,760 58.18% 4,853 41.76% 7 0.06% 1956 7,378 63.46% 4,242 36.48% 7 0.06% 1960 5,709 47.96% 6,188 51.99% 6 0.05% 1964 4,692 39.00% 7,339 61.00% 0 0.00% 1968 6,561 53.78% 4,453 36.50% 1,185 9.71% 1972 7,931 62.39% 4,756 37.41% 25 0.20% 1976 7,245 53.00% 6,275 45.90% 151 1.10% 1980 8,500 62.53% 4,470 32.88% 623 4.58% 1984 9,233 66.43% 4,628 33.30% 38 0.27% 1988 7,681 56.15% 5,935 43.38% 64 0.47% 1992 5,771 36.47% 6,686 42.26% 3,365 21.27% 1996 6,065 43.81% 6,104 44.09% 1,675 12.10% 2000 8,588 55.67% 6,436 41.72% 403 2.61% 2004 10,219 59.65% 6,797 39.68% 115 0.67% 2008 9,357 54.04% 7,657 44.22% 300 1.73% 2012 10,524 63.86% 5,596 33.95% 361 2.19% 2016 12,412 71.26% 3,945 22.65% 1,062 6.10% 2020 14,304 74.45% 4,493 23.38% 417 2.17% 2024 14,407 74.62% 4,447 23.03% 452 2.34%
Specific ^ "County Population Totals and Components of Change: 2020–2024" .United States Census Bureau . U.S. Department of Commerce. March 2025. RetrievedAugust 31, 2025 .^ "Clinton County, Illinois" .United States Census Bureau . RetrievedJune 8, 2023 .^ "Find a County" . National Association of Counties. Archived fromthe original on May 31, 2011. RetrievedJune 7, 2011 .^ "Mean Center of Population for the United States: 1790 to 2000" (PDF) . US Census Bureau. Archived fromthe original (PDF) on November 3, 2001. RetrievedSeptember 17, 2011 .^ Douglas K. Meyer (2000).Making the Heartland Quilt ISBN 0-8093-2289-7 . RetrievedSeptember 11, 2011 . ^ 1913 Commercial History of Clinton County, Illinois Archived July 23, 2011, at theWayback Machine from clinton.ilgenweb.net. Retrieved November 10, 2010^ "History, Index, Clinton Co, IL" .clintonilgenweb.org . RetrievedDecember 10, 2024 .^ History of Marion and Clinton Counties, Illinois ^ Gannett, Henry (1973).The Origin of Certain Place Names in the United States ^a b Attractions & Outdoor Recreation Archived February 7, 2007, at theWayback Machine , City of Carlyle, Official site^ "Suspension Bridge, Spanning Kaskaskia River, Carlyle, Clinton, IL" .Historic American Buildings Survey Archived from the original on October 2, 2012. RetrievedSeptember 11, 2011 .^ Plaque on site,Photograph of plaque at Bridgemeister Archived September 27, 2007, at theWayback Machine . ^a b "Population, Housing Units, Area, and Density: 2010 - County" . US Census Bureau. Archived fromthe original on February 12, 2020. RetrievedJuly 11, 2015 .^a b "Monthly Averages for Carlyle IL" . The Weather Channel.Archived from the original on October 23, 2012. RetrievedJanuary 27, 2011 .^ "Population and Housing Unit Estimates Tables" . United States Census Bureau. RetrievedJuly 24, 2025 .^ "US Decennial Census" . US Census Bureau. RetrievedJuly 4, 2014 .^ "Historical Census Browser" . University of Virginia Library. Archived fromthe original on December 26, 2013. RetrievedJuly 4, 2014 .^ "Population of Counties by Decennial Census: 1900 to 1990" . US Census Bureau.Archived from the original on April 24, 2014. RetrievedJuly 4, 2014 .^ "Census 2000 PHC-T-4. Ranking Tables for Counties: 1990 and 2000" (PDF) . US Census Bureau.Archived (PDF) from the original on December 18, 2014. RetrievedJuly 4, 2014 .^ "State & County QuickFacts" . US Census Bureau. Archived fromthe original on July 14, 2014. RetrievedJuly 4, 2014 .^ "1980 Census of Population - General Population Characteristics - Illinois- Table 14 - Persons by Race and Table 16 (p. 18-28) - Total Persons and Spanish Origin Persons by Type of Spanish Origin and Race (p. 29-39)" (PDF) .United States Census Bureau ^ "1990 Census of Population - General Population Characteristics - Illinois - Table 6 - Race and Hispanic Orogin" (PDF) .United States Census Bureau ^ "P004: Hispanic or Latino, and Not Hispanic or Latino by Race – 2000: DEC Summary File 1 – Clinton County, Illinois" .United States Census Bureau ^ "P2: Hispanic or Latino, and Not Hispanic or Latino by Race – 2010: DEC Redistricting Data (PL 94-171) – Clinton County, Illinois" .United States Census Bureau ^ "P2: Hispanic or Latino, and Not Hispanic or Latino by Race – 2020: DEC Redistricting Data (PL 94-171) – Clinton County, Illinois" .United States Census Bureau ^ included in the Asian category in the 1980 Census ^ included in the Asian category in the 1990 Census ^ not an option in the 1980 Census ^ not an option in the 1990 Census ^ "Profile of General Population and Housing Characteristics: 2010 Demographic Profile Data" . US Census Bureau. Archived fromthe original on February 13, 2020. RetrievedJuly 11, 2015 .^ "Selected Social Characteristics in the United States – 2006-2010 American Community Survey 5-Year Estimates" . US Census Bureau. Archived fromthe original on February 13, 2020. RetrievedJuly 11, 2015 .^ "Selected Economic Characteristics – 2006-2010 American Community Survey 5-Year Estimates" . US Census Bureau. Archived fromthe original on February 13, 2020. RetrievedJuly 11, 2015 .^ https://www.wsj.com/opinion/illinois-counties-secession-vote-indiana-j-b-pritzker-todd-huston-5a93d624 ^ Leip, David."Dave Leip's Atlas of U.S. Presidential Elections" .uselectionatlas.org .Archived from the original on March 23, 2018. RetrievedMay 1, 2018 . General
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