Warren County, Illinois | |
|---|---|
 Warren County Courthouse in Monmouth | |
 Location within the U.S. state ofIllinois | |
| Coordinates:40°51′N90°37′W / 40.85°N 90.61°W /40.85; -90.61 | |
| Country |  United States |
| State |  Illinois |
| Founded | 1825 |
| Named after | Joseph Warren |
| Seat | Monmouth |
| Largest city | Monmouth |
| Area | |
• Total | 543 sq mi (1,410 km2) |
| • Land | 542 sq mi (1,400 km2) |
| • Water | 0.6 sq mi (1.6 km2) 0.1% |
| Population (2020) | |
• Total | 16,835 |
• Estimate (2024) | 16,217 [1] |
| • Density | 31.1/sq mi (12.0/km2) |
| Time zone | UTC−6 (Central) |
| • Summer (DST) | UTC−5 (CDT) |
| Congressional districts | 15th,17th |
| Website | www |
Warren County is acounty in theU.S. state ofIllinois. According to the2020 census, it had a population of 16,835.[2] Itscounty seat isMonmouth.[3]
Warren County was organized in 1825 out ofPike County which consisted of all portions of the state north and west of the Illinois River before 1825.Henderson County was formed in 1841 from the western area of Warren County.
Warren County was named for Dr.Joseph Warren, killed at theBattle of Bunker Hill in 1775. He is believed to have been the first officer to die in theRevolutionary War.
The current courthouse, constructed of red Portage stone, was completed in 1895.
![Between 1831 and 1835, Mercer County was temporarily attached to Warren until it could organize its own county government.[4]](/mt/?noimg=&dark=on&url=http%3a%2f%2fen.wikipedia.org%2fwiki%2fFile%3aWarren_County_Illinois_1831.png)
According to theU.S. Census Bureau, the county has a total area of 543 square miles (1,410 km2), of which 542 square miles (1,400 km2) is land and 0.6 square miles (1.6 km2) (0.1%) is water.[5]
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In recent years, average temperatures in the county seat of Monmouth have ranged from a low of 15 °F (−9 °C) in January to a high of 85 °F (29 °C) in July, although a record low of −27 °F (−33 °C) was recorded in February 1905 and a record high of 110 °F (43 °C) was recorded in July 1936. Average monthly precipitation ranged from 1.62 inches (41 mm) in January to 4.33 inches (110 mm) in July.[6]
| Census | Pop. | Note | %± |
|---|---|---|---|
| 1830 | 308 | — | |
| 1840 | 6,739 | 2,088.0% | |
| 1850 | 8,176 | 21.3% | |
| 1860 | 18,336 | 124.3% | |
| 1870 | 23,174 | 26.4% | |
| 1880 | 22,933 | −1.0% | |
| 1890 | 21,281 | −7.2% | |
| 1900 | 23,163 | 8.8% | |
| 1910 | 23,313 | 0.6% | |
| 1920 | 21,488 | −7.8% | |
| 1930 | 21,745 | 1.2% | |
| 1940 | 21,286 | −2.1% | |
| 1950 | 21,981 | 3.3% | |
| 1960 | 21,587 | −1.8% | |
| 1970 | 21,595 | 0.0% | |
| 1980 | 21,943 | 1.6% | |
| 1990 | 19,181 | −12.6% | |
| 2000 | 18,735 | −2.3% | |
| 2010 | 17,707 | −5.5% | |
| 2020 | 16,835 | −4.9% | |
| 2024 (est.) | 16,217 | [7] | −3.7% |
| U.S. Decennial Census[8] 1790-1960[9] 1900-1990[10] 1990-2000[11] 2010[12] | |||
As of the2020 census, the county had a population of 16,835. The median age was 40.9 years, with 21.3% of residents under the age of 18 and 21.0% aged 65 years or older. For every 100 females there were 98.1 males, and for every 100 females age 18 and over there were 96.5 males age 18 and over.[13][14]
The racial makeup of the county was 82.2%White, 3.5%Black or African American, 0.4%American Indian and Alaska Native, 2.0%Asian, 0.1%Native Hawaiian andPacific Islander, 5.6% from other races, and 6.2% fromtwo or more races.Hispanic or Latino residents of any race comprised 10.6% of the population.[14]
54.6% of residents lived in urban areas, while 45.4% lived in rural areas.[15]
There were 6,720 households in the county, of which 27.4% had children under the age of 18 living in them. Of all households, 48.3% were married-couple households, 19.3% were households with a male householder and no spouse or partner present, and 25.2% were households with a female householder and no spouse or partner present. About 31.1% of all households were made up of individuals and 15.3% had someone living alone who was 65 years of age or older.[13]
There were 7,602 housing units, of which 11.6% were vacant. Among occupied housing units, 74.4% were owner-occupied and 25.6% were renter-occupied. The homeowner vacancy rate was 2.5% and the rental vacancy rate was 8.3%.[13]
| Race / Ethnicity(NH = Non-Hispanic) | Pop 1980[16] | Pop 1990[17] | Pop 2000[18] | Pop 2010[19] | Pop 2020[20] | % 1980 | % 1990 | % 2000 | % 2010 | % 2020 |
|---|---|---|---|---|---|---|---|---|---|---|
| White alone (NH) | 21,213 | 18,518 | 17,672 | 15,582 | 13,494 | 96.67% | 96.54% | 94.33% | 88.00% | 80.15% |
| Black or African American alone (NH) | 360 | 355 | 296 | 287 | 577 | 1.64% | 1.85% | 1.58% | 1.62% | 3.43% |
| Native American orAlaska Native alone (NH) | 31 | 20 | 30 | 32 | 31 | 0.14% | 0.10% | 0.16% | 0.18% | 0.18% |
| Asian alone (NH) | 63 | 69 | 61 | 93 | 329 | 0.29% | 0.36% | 0.33% | 0.53% | 1.95% |
| Native Hawaiian orPacific Islander alone (NH) | x[21] | x[22] | 17 | 9 | 15 | x | x | 0.09% | 0.05% | 0.09% |
| Other race alone (NH) | 41 | 12 | 6 | 9 | 46 | 0.19% | 0.06% | 0.03% | 0.05% | 0.27% |
| Mixed race or Multiracial (NH) | x[23] | x[24] | 146 | 205 | 554 | x | x | 0.78% | 1.16% | 3.29% |
| Hispanic or Latino (any race) | 235 | 207 | 507 | 1,490 | 1,789 | 1.07% | 1.08% | 2.71% | 8.41% | 10.63% |
| Total | 21,943 | 19,181 | 18,735 | 17,707 | 16,835 | 100.00% | 100.00% | 100.00% | 100.00% | 100.00% |
At the2010 United States census, there were 17,707 people, 6,918 households and 4,617 families residing in the county.[25] The population density was 32.6 inhabitants per square mile (12.6/km2). There were 7,682 housing units at an average density of 14.2 per square mile (5.5/km2).[5] The racial makeup of the county was 91.3% white, 1.7% black or African American, 0.5% Asian, 0.2% American Indian, 0.1% Pacific islander, 4.5% from other races, and 1.6% from two or more races. Those of Hispanic or Latino origin made up 8.4% of the population.[25] In terms of ancestry, 25.2% wereGerman, 14.7% wereIrish, 11.3% wereEnglish, 10.0% wereSwedish, and 5.5% wereAmerican.[26]
Of the 6,918 households, 29.6% had children under the age of 18 living with them, 52.2% were married couples living together, 9.7% had a female householder with no husband present, 33.3% were non-families, and 28.2% of all households were made up of individuals. The average household size was 2.40 and the average family size was 2.91. The median age was 39.6 years.[25]
Themedian household income was $41,636 and the median family income was $49,623. Males had a median income of $40,289 and females $25,460. The per capita incomewas $20,047. About 11.0% of families and 13.4% of the population were below thepoverty line, including 18.1% of those under age 18 and 10.6% of those age 65 or over.[27]
Warren County is located inIllinois's 17th Congressional District and is currently represented by DemocratCheri Bustos. For theIllinois House of Representatives, the county is split between the 93rd district, currently represented by RepublicanNorine Hammond, and the 94th district, currently represented byRandy Frese. The county is located in the 47th district of theIllinois Senate, and is currently represented by RepublicanJil Tracy.
In presidential elections, Warren County voted for the Republican Party's candidate in every election from1936 through 1988, often by a wide margin. From 1992 to 2012, the contest in Warren County was more competitive, with the Democratic Party's candidate winning four out of six times. In every election since then, the county has voted Republican by increasing double-digit margins.
| Year | Republican | Democratic | Third party(ies) | |||
|---|---|---|---|---|---|---|
| No. | % | No. | % | No. | % | |
| 1892 | 2,725 | 50.69% | 2,294 | 42.67% | 357 | 6.64% |
| 1896 | 3,394 | 55.24% | 2,604 | 42.38% | 146 | 2.38% |
| 1900 | 3,618 | 56.97% | 2,501 | 39.38% | 232 | 3.65% |
| 1904 | 3,563 | 61.35% | 1,559 | 26.84% | 686 | 11.81% |
| 1908 | 3,283 | 54.12% | 2,327 | 38.36% | 456 | 7.52% |
| 1912 | 2,627 | 44.03% | 2,080 | 34.86% | 1,259 | 21.10% |
| 1916 | 6,294 | 56.44% | 4,498 | 40.33% | 360 | 3.23% |
| 1920 | 6,309 | 69.41% | 2,236 | 24.60% | 545 | 6.00% |
| 1924 | 6,912 | 65.07% | 2,440 | 22.97% | 1,271 | 11.96% |
| 1928 | 7,915 | 73.61% | 2,681 | 24.93% | 157 | 1.46% |
| 1932 | 5,498 | 48.84% | 5,610 | 49.83% | 150 | 1.33% |
| 1936 | 6,919 | 55.51% | 5,409 | 43.39% | 137 | 1.10% |
| 1940 | 7,790 | 61.17% | 4,878 | 38.30% | 67 | 0.53% |
| 1944 | 7,085 | 64.12% | 3,926 | 35.53% | 39 | 0.35% |
| 1948 | 6,738 | 66.20% | 3,367 | 33.08% | 74 | 0.73% |
| 1952 | 8,020 | 72.88% | 2,973 | 27.02% | 11 | 0.10% |
| 1956 | 7,580 | 71.63% | 2,996 | 28.31% | 6 | 0.06% |
| 1960 | 7,221 | 65.25% | 3,835 | 34.66% | 10 | 0.09% |
| 1964 | 5,258 | 52.95% | 4,670 | 47.02% | 3 | 0.03% |
| 1968 | 5,877 | 60.00% | 3,085 | 31.50% | 833 | 8.50% |
| 1972 | 7,021 | 70.15% | 2,969 | 29.67% | 18 | 0.18% |
| 1976 | 5,822 | 59.25% | 3,808 | 38.75% | 196 | 1.99% |
| 1980 | 5,667 | 62.47% | 2,756 | 30.38% | 648 | 7.14% |
| 1984 | 5,846 | 63.59% | 3,318 | 36.09% | 29 | 0.32% |
| 1988 | 4,584 | 55.54% | 3,617 | 43.82% | 53 | 0.64% |
| 1992 | 3,325 | 39.37% | 3,661 | 43.35% | 1,460 | 17.29% |
| 1996 | 2,974 | 41.02% | 3,500 | 48.28% | 776 | 10.70% |
| 2000 | 3,899 | 51.09% | 3,524 | 46.18% | 208 | 2.73% |
| 2004 | 4,474 | 52.90% | 3,938 | 46.56% | 45 | 0.53% |
| 2008 | 3,637 | 45.12% | 4,286 | 53.17% | 138 | 1.71% |
| 2012 | 3,618 | 46.28% | 4,044 | 51.73% | 156 | 2.00% |
| 2016 | 4,275 | 54.76% | 2,987 | 38.26% | 545 | 6.98% |
| 2020 | 4,676 | 59.01% | 3,090 | 39.00% | 158 | 1.99% |
| 2024 | 4,579 | 61.30% | 2,711 | 36.29% | 180 | 2.41% |
U.S. Highway 34
U.S. Highway 67
Illinois Route 94
Illinois Route 116
Illinois Route 135
Illinois Route 164In a scene in the 2018 film "Halloween", the local sheriff drives a car that says Warren County Sheriff's Department. Confirming that the fictional town of Haddonfield is located in Warren County.
Warren County/Monmouth Auxiliary Police Corps
Warren County is divided into thesetownships:
Municipalities and communities ofWarren County, Illinois,United States | ||
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| Footnotes | ‡This populated place also has portions in an adjacent county or counties | |
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