Shelby County, Illinois

Last updated

Shelby County
County
Shelby County Courthouse in Illinois.jpg
Shelby County Courthouse
Map of Illinois highlighting Shelby County.svg
Location within the U.S. state of Illinois
Illinois in United States.svg
Illinois's location within the U.S.
Coordinates: 39°23′N88°49′W / 39.39°N 88.81°W / 39.39; -88.81
CountryFlag of the United States.svg United States
StateFlag of Illinois.svg Illinois
Founded1827
Named after Isaac Shelby
Seat Shelbyville
Largest cityShelbyville
Area
 • Total
768 sq mi (1,990 km2)
 • Land759 sq mi (1,970 km2)
 • Water9.5 sq mi (25 km2)  1.2%
Population
 (2020)
 • Total
20,990
 • Estimate 
(2024)
20,542 Decrease2.svg [1]
 • Density27/sq mi (11/km2)
Time zone UTC−6 (Central)
 • Summer (DST) UTC−5 (CDT)
Congressional district 15th
Website www.shelbycounty-il.com

Shelby County is a county located in the U.S. state of Illinois. According to the 2020 census, it had a population of 20,990. [2] Its county seat is Shelbyville. [3]

Contents

History

Shelby County was established in 1827 out of Fayette County. It was named in honor of Isaac Shelby, governor of Kentucky and participant in the American Revolutionary War.

Geography

According to the U.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]

Climate and weather

Shelbyville, Illinois
Climate chart (explanation)
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Source: The Weather Channel [6]
Metric conversion
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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]

Major highways

Adjacent counties

Demographics

Historical population
CensusPop.Note%±
1830 2,972—
1840 6,659124.1%
1850 7,80717.2%
1860 14,61387.2%
1870 25,47674.3%
1880 30,27018.8%
1890 31,1913.0%
1900 32,1263.0%
1910 31,693−1.3%
1920 29,601−6.6%
1930 25,471−14.0%
1940 26,2903.2%
1950 24,434−7.1%
1960 23,404−4.2%
1970 22,589−3.5%
1980 23,9235.9%
1990 22,261−6.9%
2000 22,8932.8%
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]

2020 census

Shelby 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 [12] Pop 1990 [13] Pop 2000 [14] Pop 2010 [15] Pop 2020 [16] % 1980% 1990% 2000% 2010% 2020
White alone (NH)23,71522,15222,58121,92220,11699.13%99.51%98.64%98.03%95.84%
Black or African American alone (NH)21143548650.09%0.06%0.15%0.21%0.31%
Native American or Alaska Native alone (NH)19262439350.08%0.12%0.10%0.17%0.17%
Asian alone (NH)39224656830.16%0.10%0.20%0.25%0.40%
Native Hawaiian or Pacific Islander alone (NH)x [17] x [18] 051xx0.00%0.02%0.00%
Other race alone (NH)16254400.07%0.01%0.02%0.02%0.19%
Mixed race or Multiracial (NH)x [19] x [20] 92109437xx0.40%0.49%2.08%
Hispanic or Latino (any race)113451101802130.47%0.20%0.48%0.80%1.01%
Total23,92322,26122,89322,36320,990 100.00%100.00%100.00%100.00%100.00%

2010 census

As of the 2010 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% were German, 9.9% were English, 9.8% were American, and 8.8% were Irish. [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 the poverty line, including 16.7% of those under age 18 and 8.1% of those age 65 or over. [23]

Census-designated place

The Census Bureau has defined one census-designated place (CDP) in Shelby County.

Government

Townships

Shelby County is divided into these townships:

Communities

Cities

Town

Villages

Census-designated place

Other unincorporated communities

Politics

United States presidential election results for Shelby County, Illinois [24]
Year Republican Democratic Third party(ies)
No. %No. %No. %
1892 2,30432.45%3,52349.62%1,27317.93%
1896 3,07138.75%4,70959.42%1451.83%
1900 3,36541.38%4,51455.52%2523.10%
1904 3,22046.53%2,96242.80%73810.66%
1908 3,31242.30%4,06551.92%4535.79%
1912 1,43120.77%3,46750.33%1,99128.90%
1916 5,91142.61%7,51554.18%4453.21%
1920 6,35153.93%5,11343.42%3122.65%
1924 5,60548.13%5,26545.21%7766.66%
1928 7,21462.58%4,07135.31%2432.11%
1932 4,65735.91%8,09362.40%2191.69%
1936 5,79540.81%8,18657.64%2201.55%
1940 7,25047.71%7,70450.69%2431.60%
1944 6,20150.65%5,91948.35%1231.00%
1948 5,28247.89%5,58950.68%1581.43%
1952 7,18957.65%5,26842.25%120.10%
1956 7,07556.94%5,33742.95%130.10%
1960 6,87254.53%5,72045.39%110.09%
1964 4,28137.66%7,08862.34%00.00%
1968 5,48749.27%4,52840.66%1,12210.07%
1972 7,21762.08%4,38937.75%200.17%
1976 5,23445.54%6,17253.70%870.76%
1980 6,44159.12%3,98836.61%4654.27%
1984 6,37259.38%4,31740.23%410.38%
1988 5,37053.28%4,65046.14%580.58%
1992 3,63132.49%5,10145.65%2,44321.86%
1996 4,21543.06%4,24943.41%1,32413.53%
2000 5,85157.57%4,01839.54%2942.89%
2004 6,75363.85%3,74435.40%800.76%
2008 6,39658.67%4,24538.94%2612.39%
2012 6,84365.55%3,34232.01%2542.43%
2016 8,22974.48%2,28820.71%5324.81%
2020 9,42677.80%2,50420.67%1851.53%
2024 9,26779.18%2,24019.14%1961.67%

See also

References

  1. ↑ "County Population Totals and Components of Change: 2020–2024". United States Census Bureau. U.S. Department of Commerce. March 2025. Retrieved August 31, 2025.
  2. 1 2 "State & County QuickFacts". United States Census Bureau. Retrieved July 8, 2014.
  3. ↑ "Find a County". National Association of Counties. Retrieved June 7, 2011.
  4. ↑ White, Jesse. Origin and Evolution of Illinois Counties. State of Illinois, March 2010.
  5. 1 2 "Population, Housing Units, Area, and Density: 2010 - County". United States Census Bureau. Archived from the original on February 12, 2020. Retrieved July 12, 2015.
  6. 1 2 "Monthly Averages for Shelbyville, Illinois". The Weather Channel. Retrieved January 27, 2011.
  7. ↑ "Annual Estimates of the Resident Population for Counties: April 1, 2020 to July 1, 2023". United States Census Bureau. Retrieved April 2, 2024.
  8. ↑ "U.S. Decennial Census". United States Census Bureau. Retrieved July 8, 2014.
  9. ↑ "Historical Census Browser". University of Virginia Library. Retrieved July 8, 2014.
  10. ↑ "Population of Counties by Decennial Census: 1900 to 1990". United States Census Bureau. Retrieved July 8, 2014.
  11. ↑ "Census 2000 PHC-T-4. Ranking Tables for Counties: 1990 and 2000" (PDF). United States Census Bureau. Retrieved July 8, 2014.
  12. ↑ "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 .
  13. ↑ "1990 Census of Population - General Population Characteristics - Illinois - Table 6 - Race and Hispanic Orogin" (PDF). United States Census Bureau .
  14. ↑ "P004: Hispanic or Latino, and Not Hispanic or Latino by Race – 2000: DEC Summary File 1 – Shelby County, Illinois". United States Census Bureau .
  15. ↑ "P2: Hispanic or Latino, and Not Hispanic or Latino by Race – 2010: DEC Redistricting Data (PL 94-171) – Shelby County, Illinois". United States Census Bureau .
  16. ↑ "P2: Hispanic or Latino, and Not Hispanic or Latino by Race – 2020: DEC Redistricting Data (PL 94-171) – Shelby County, Illinois". United States Census Bureau .
  17. ↑ included in the Asian category in the 1980 Census
  18. ↑ included in the Asian category in the 1990 Census
  19. ↑ not an option in the 1980 Census
  20. ↑ not an option in the 1990 Census
  21. 1 2 3 "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.
  22. ↑ "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.
  23. ↑ "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.
  24. ↑ Leip, David. "Dave Leip's Atlas of U.S. Presidential Elections". uselectionatlas.org. Retrieved November 12, 2018.

39°23′N88°49′W / 39.39°N 88.81°W / 39.39; -88.81

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