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Hamilton County, Illinois
Map of Illinois highlighting Hamilton County
Location in the state of Illinois
Map of the U.S. highlighting Illinois
Illinois's location in the U.S.
Founded 1821
Seat McLeansboro
Largest city McLeansboro
 - Total
 - Land
 - Water

436 sq mi (1,129 km²)
435 sq mi (1,127 km²)
1 sq mi (2 km²), 0.15%
 - (2000)
 - Density

20/sq mi (8/km²)
Time zone Central: UTC-6/-5

Hamilton County is a county located in the U.S. state of Illinois. As of 2000, the population is 8,621. Its county seat is McLeansboro6.


According to the U.S. Census Bureau, the county has a total area of 1,129 km² (436 sq mi). 1,127 km² (435 sq mi) of it is land and 2 km² (1 sq mi) of it (0.15%) is water.

Adjacent Counties[]


Hamilton County was formed out of White County in 1821. It is named for Alexander Hamilton, Revolutionary War hero and the first United States Secretary of the Treasury.


2000 census age pyramid for Hamilton County.

Historical populations
Census Pop.
1900 20,197
1910 18,227 −9.8%
1920 15,920 −12.7%
1930 12,995 −18.4%
1940 13,454 3.5%
1950 12,256 −8.9%
1960 10,010 −18.3%
1970 8,665 −13.4%
1980 9,172 5.9%
1990 8,499 −7.3%
2000 8,621 1.4%
IL Counties 1900-1990

As of the census2 of 2000, there were 8,621 people, 3,462 households, and 2,437 families residing in the county. The population density was 8/km² (20/sq mi). There were 3,983 housing units at an average density of 4/km² (9/sq mi). 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.

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[]

External links[]

Hamilton County Community Unit District No.10 Schools

Census designated places[]

Coordinates: 38°05′N 88°32′W / 38.08, -88.54

This page uses content from the English language Wikipedia. The original content was at Hamilton County, Illinois. The list of authors can be seen in the page history. As with this Familypedia wiki, the content of Wikipedia is available under the Creative Commons License.