Shelby County, Illinois | |
|---|---|
 | |
 Location within the U.S. state ofIllinois | |
 Illinois's location within theU.S. | |
| Coordinates:39°23′N88°49′W / 39.39°N 88.81°W /39.39; -88.81 | |
| Country |  United States |
| State |  Illinois |
| Founded | 1827 |
| Named after | Isaac Shelby |
| Seat | Shelbyville |
| Largest city | Shelbyville |
| Area | |
• Total | 768 sq mi (1,990 km2) |
| • Land | 759 sq mi (1,970 km2) |
| • Water | 9.5 sq mi (25 km2) 1.2% |
| Population (2020) | |
• Total | 20,990 |
• Estimate (2024) | 20,542 [1] |
| • Density | 27.7/sq mi (10.7/km2) |
| Time zone | UTC−6 (Central) |
| • Summer (DST) | UTC−5 (CDT) |
| Congressional district | 15th |
| Website | www |
Shelby County is acounty located in theU.S. state ofIllinois. According to the2020 census, it had a population of 20,990.[2] Itscounty seat isShelbyville.[3]
Shelby County was established in 1827 out ofFayette County. It was named in honor ofIsaac Shelby, governor ofKentucky and participant in theAmerican Revolutionary War.
![Shelby county from the time of its creation to 1829, including a large tract of unorganized territory temporarily attached to it, whose precise border was not defined.[4]](/mt/?noimg=&dark=on&url=http%3a%2f%2fen.wikipedia.org%2fwiki%2fFile%3aShelby_County_Illinois_1827.png)
According to theU.S. Census Bureau, the county has a total area of 768 square miles (1,990 km2), of which 759 square miles (1,970 km2) is land and 9.5 square miles (25 km2) (1.2%) is water.[5]
| Shelbyville, Illinois | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Climate chart (explanation) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
In recent years, average temperatures in the county seat of Shelbyville have ranged from a low of 19 °F (−7 °C) in January to a high of 87 °F (31 °C) in July, although a record low of −26 °F (−32 °C) was recorded in January 1915 and a record high of 111 °F (44 °C) was recorded in July 1936. Average monthly precipitation ranged from 1.89 inches (48 mm) in February to 4.05 inches (103 mm) in June.[6]
| Census | Pop. | Note | %± |
|---|---|---|---|
| 1830 | 2,972 | — | |
| 1840 | 6,659 | 124.1% | |
| 1850 | 7,807 | 17.2% | |
| 1860 | 14,613 | 87.2% | |
| 1870 | 25,476 | 74.3% | |
| 1880 | 30,270 | 18.8% | |
| 1890 | 31,191 | 3.0% | |
| 1900 | 32,126 | 3.0% | |
| 1910 | 31,693 | −1.3% | |
| 1920 | 29,601 | −6.6% | |
| 1930 | 25,471 | −14.0% | |
| 1940 | 26,290 | 3.2% | |
| 1950 | 24,434 | −7.1% | |
| 1960 | 23,404 | −4.2% | |
| 1970 | 22,589 | −3.5% | |
| 1980 | 23,923 | 5.9% | |
| 1990 | 22,261 | −6.9% | |
| 2000 | 22,893 | 2.8% | |
| 2010 | 22,363 | −2.3% | |
| 2020 | 20,990 | −6.1% | |
| 2023 (est.) | 20,568 | [7] | −2.0% |
| U.S. Decennial Census[8] 1790-1960[9] 1900-1990[10] 1990-2000[11] 2010-2013[2] | |||
| Race / Ethnicity(NH = Non-Hispanic) | Pop 1980[12] | Pop 1990[13] | Pop 2000[14] | Pop 2010[15] | Pop 2020[16] | % 1980 | % 1990 | % 2000 | % 2010 | % 2020 |
|---|---|---|---|---|---|---|---|---|---|---|
| White alone (NH) | 23,715 | 22,152 | 22,581 | 21,922 | 20,116 | 99.13% | 99.51% | 98.64% | 98.03% | 95.84% |
| Black or African American alone (NH) | 21 | 14 | 35 | 48 | 65 | 0.09% | 0.06% | 0.15% | 0.21% | 0.31% |
| Native American orAlaska Native alone (NH) | 19 | 26 | 24 | 39 | 35 | 0.08% | 0.12% | 0.10% | 0.17% | 0.17% |
| Asian alone (NH) | 39 | 22 | 46 | 56 | 83 | 0.16% | 0.10% | 0.20% | 0.25% | 0.40% |
| Native Hawaiian orPacific Islander alone (NH) | x[17] | x[18] | 0 | 5 | 1 | x | x | 0.00% | 0.02% | 0.00% |
| Other race alone (NH) | 16 | 2 | 5 | 4 | 40 | 0.07% | 0.01% | 0.02% | 0.02% | 0.19% |
| Mixed race or Multiracial (NH) | x[19] | x[20] | 92 | 109 | 437 | x | x | 0.40% | 0.49% | 2.08% |
| Hispanic or Latino (any race) | 113 | 45 | 110 | 180 | 213 | 0.47% | 0.20% | 0.48% | 0.80% | 1.01% |
| Total | 23,923 | 22,261 | 22,893 | 22,363 | 20,990 | 100.00% | 100.00% | 100.00% | 100.00% | 100.00% |
As of the2010 United States census, there were 22,363 people, 9,216 households, and 6,376 families living in the county.[21] The population density was 29.5 inhabitants per square mile (11.4/km2). There were 10,396 housing units at an average density of 13.7 per square mile (5.3/km2).[5] The racial makeup of the county was 98.6% white, 0.3% Asian, 0.2% American Indian, 0.2% black or African American, 0.2% from other races, and 0.6% from two or more races. Those of Hispanic or Latino origin made up 0.8% of the population.[21] In terms of ancestry, 25.5% wereGerman, 9.9% wereEnglish, 9.8% wereAmerican, and 8.8% wereIrish.[22]
Of the 9,216 households, 29.2% had children under the age of 18 living with them, 57.1% were married couples living together, 8.0% had a female householder with no husband present, 30.8% were non-families, and 27.1% of all households were made up of individuals. The average household size was 2.40 and the average family size was 2.90. The median age was 43.5 years.[21]
The median income for a household in the county was $44,627 and the median income for a family was $55,655. Males had a median income of $40,119 versus $27,860 for females. The per capita income for the county was $21,891. About 7.8% of families and 11.3% of the population were below thepoverty line, including 16.7% of those under age 18 and 8.1% of those age 65 or over.[23]
The Census Bureau has defined onecensus-designated place (CDP) in Shelby County.
Shelby County is divided into thesetownships:
| Year | Republican | Democratic | Third party(ies) | |||
|---|---|---|---|---|---|---|
| No. | % | No. | % | No. | % | |
| 1892 | 2,304 | 32.45% | 3,523 | 49.62% | 1,273 | 17.93% |
| 1896 | 3,071 | 38.75% | 4,709 | 59.42% | 145 | 1.83% |
| 1900 | 3,365 | 41.38% | 4,514 | 55.52% | 252 | 3.10% |
| 1904 | 3,220 | 46.53% | 2,962 | 42.80% | 738 | 10.66% |
| 1908 | 3,312 | 42.30% | 4,065 | 51.92% | 453 | 5.79% |
| 1912 | 1,431 | 20.77% | 3,467 | 50.33% | 1,991 | 28.90% |
| 1916 | 5,911 | 42.61% | 7,515 | 54.18% | 445 | 3.21% |
| 1920 | 6,351 | 53.93% | 5,113 | 43.42% | 312 | 2.65% |
| 1924 | 5,605 | 48.13% | 5,265 | 45.21% | 776 | 6.66% |
| 1928 | 7,214 | 62.58% | 4,071 | 35.31% | 243 | 2.11% |
| 1932 | 4,657 | 35.91% | 8,093 | 62.40% | 219 | 1.69% |
| 1936 | 5,795 | 40.81% | 8,186 | 57.64% | 220 | 1.55% |
| 1940 | 7,250 | 47.71% | 7,704 | 50.69% | 243 | 1.60% |
| 1944 | 6,201 | 50.65% | 5,919 | 48.35% | 123 | 1.00% |
| 1948 | 5,282 | 47.89% | 5,589 | 50.68% | 158 | 1.43% |
| 1952 | 7,189 | 57.65% | 5,268 | 42.25% | 12 | 0.10% |
| 1956 | 7,075 | 56.94% | 5,337 | 42.95% | 13 | 0.10% |
| 1960 | 6,872 | 54.53% | 5,720 | 45.39% | 11 | 0.09% |
| 1964 | 4,281 | 37.66% | 7,088 | 62.34% | 0 | 0.00% |
| 1968 | 5,487 | 49.27% | 4,528 | 40.66% | 1,122 | 10.07% |
| 1972 | 7,217 | 62.08% | 4,389 | 37.75% | 20 | 0.17% |
| 1976 | 5,234 | 45.54% | 6,172 | 53.70% | 87 | 0.76% |
| 1980 | 6,441 | 59.12% | 3,988 | 36.61% | 465 | 4.27% |
| 1984 | 6,372 | 59.38% | 4,317 | 40.23% | 41 | 0.38% |
| 1988 | 5,370 | 53.28% | 4,650 | 46.14% | 58 | 0.58% |
| 1992 | 3,631 | 32.49% | 5,101 | 45.65% | 2,443 | 21.86% |
| 1996 | 4,215 | 43.06% | 4,249 | 43.41% | 1,324 | 13.53% |
| 2000 | 5,851 | 57.57% | 4,018 | 39.54% | 294 | 2.89% |
| 2004 | 6,753 | 63.85% | 3,744 | 35.40% | 80 | 0.76% |
| 2008 | 6,396 | 58.67% | 4,245 | 38.94% | 261 | 2.39% |
| 2012 | 6,843 | 65.55% | 3,342 | 32.01% | 254 | 2.43% |
| 2016 | 8,229 | 74.48% | 2,288 | 20.71% | 532 | 4.81% |
| 2020 | 9,426 | 77.80% | 2,504 | 20.67% | 185 | 1.53% |
| 2024 | 9,267 | 79.18% | 2,240 | 19.14% | 196 | 1.67% |
Places adjacent to Shelby County, Illinois | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ||||||||||||||||
Municipalities and communities ofShelby County, Illinois,United States | ||
|---|---|---|
| Cities |  | |
| Towns | ||
| Villages | ||
| Townships | ||
| CDPs | ||
| Other communities | ||
| Footnotes | ‡This populated place also has portions in an adjacent county or counties | |
| International | |
|---|---|
| National | |
| Geographic | |
| Other | |
