Hamilton County, Illinois
|Hamilton County, Illinois|
Location in the state of Illinois
Illinois's location in the U.S.
435.89 sq mi (1,129 km²)
434.66 sq mi (1,126 km²)
1.23 sq mi (3 km²), 0.28%
20/sq mi (8/km²)
|Time zone||Central: UTC-6/-5|
Hamilton County is a county located in the U.S. state of Illinois. According to the 2010 census, it has a population of 8,457, which is a decrease of 1.9% from 8,621 in 2000. Its county seat is McLeansboro.
According to the 2010 census, the county has a total area of 435.89 square miles (1,128.9 km2), of which 434.66 square miles (1,125.8 km2) (or 99.72%) is land and 1.23 square miles (3.2 km2) (or 0.28%) is water.
Major highways 
Adjacent counties 
- Wayne County - north
- White County - east
- Gallatin County - southeast
- Saline County - south
- Franklin County - west
- Jefferson County - northwest
|IL Counties 1900-1990
As of the census of 2000, there were 8,621 people, 3,462 households, and 2,437 families residing in the county. The population density was 20 people per square mile (8/km²). There were 3,983 housing units at an average density of 9 per square mile (4/km²). The racial makeup of the county was 98.25% White, 0.67% Black or African American, 0.26% Native American, 0.13% Asian, 0.01% Pacific Islander, 0.14% from other races, and 0.55% from two or more races. 0.64% of the population were Hispanic or Latino of any race. 29.4% were of American, 22.8% German, 14.2% English and 9.1% Irish ancestry according to Census 2000. 98.5% spoke English as their first language.
There were 3,462 households out of which 30.00% had children under the age of 18 living with them, 59.00% were married couples living together, 7.90% had a female householder with no husband present, and 29.60% were non-families. 27.30% of all households were made up of individuals and 15.80% had someone living alone who was 65 years of age or older. The average household size was 2.43 and the average family size was 2.95.
In the county the population was spread out with 24.00% under the age of 18, 7.90% from 18 to 24, 24.70% from 25 to 44, 24.20% from 45 to 64, and 19.20% who were 65 years of age or older. The median age was 41 years. For every 100 females there were 93.30 males. For every 100 females age 18 and over, there were 91.00 males.
The median income for a household in the county was $30,496, and the median income for a family was $37,651. Males had a median income of $31,864 versus $17,977 for females. The per capita income for the county was $16,262. About 8.50% of families and 12.90% of the population were below the poverty line, including 19.90% of those under age 18 and 9.40% of those age 65 or over.
Cities and towns 
Unincorporated places 
- Blairsville (Flannigan's Store)
- Dale (Dales)
- Diamond City
- Flint (ghost town)
- Jefferson City, IL (ghost town near Bungay)
- Logansport, IL
- Lovilla (ghost town, see Dahlgren)
- New Bremen (see Piopolis)
- Rectorville (moved to/became Broughton)
- Slapout (ghost town)
- Tucker's Corner
Hamilton County is divided into twelve townships:
Climate and weather 
|Climate chart (explanation)|
In recent years, average temperatures in the county seat of McLeansboro have ranged from a low of 20 °F (−7 °C) in January to a high of 89 °F (32 °C) in July, although a record low of −23 °F (−31 °C) was recorded in January 1930 and a record high of 113 °F (45 °C) was recorded in July 1936. Average monthly precipitation ranged from 2.76 inches (70 mm) in February to 4.67 inches (119 mm) in May.
See also 
- "Hamilton County QuickFacts". United States Census Bureau. Retrieved 2011-11-05.
- "Find a County". National Association of Counties. Retrieved 2011-06-07.
- "Census 2010 U.S. Gazetteer Files: Counties". United States Census. Retrieved 2011-11-05.
- "American FactFinder". United States Census Bureau. Retrieved 2008-01-31.
- "Monthly Averages for McLeansboro, Illinois". The Weather Channel. Retrieved 2011-01-27.
- Hamilton County Community Unit District No.10 Schools
- Hamilton County Historical Society
- Hamilton County Foxes Football
||Jefferson County||Wayne County|
|Franklin County||White County|
|Saline County||Gallatin County|