Sangamon County, Illinois

Sangamon County, Illinois

Infobox U.S. County
county = Sangamon County
state = Illinois

map size = 125
founded = 1821
seat = Springfield | area_total_sq_mi =877
area_land_sq_mi =868
area_water_sq_mi =9
area percentage = 1.01%
census yr = 2000
pop = 188951
density_km2 =84
web =

Sangamon County is a county located in the U.S. state of Illinois. As of 2000, the population was 188,951. Its county seat is Springfield, IllinoisGR|6.

The Springfield Metropolitan Statistical Area includes Sangamon and Menard counties.


According to the U.S. Census Bureau, the county has a total area of 877 square miles (2,271 km²), of which, 868 square miles (2,249 km²) of it is land and 9 square miles (23 km²) of it (1.01%) is water.


Auburn, Ball, Buffalo Hart, Capital, Cartwright, Chatham, Clear Lake, Cooper, Cotton Hill, Curran, Divernon, Fancy Creek, Gardner, Illiopolis, Island Grove, Lanesville, Loami, Maxwell, Mechanicsburg, New Berlin, Pawnee, Rochester, Springfield, Talkington, Williams, Woodside

Adjacent counties

*Menard County, Illinois to the north
*Logan County, Illinois to the north
*Macon County, Illinois to the east
*Christian County, Illinois to the southeast
*Montgomery County, Illinois to the south
*Macoupin County, Illinois to the south
*Morgan County, Illinois to the west
*Cass County, Illinois to the west

National protected areas

* Lincoln Home National Historic Site


Sangamon County was formed in 1821 out of Madison and Bond Counties. The County was named for the Sangamon River, which runs through it. The name of the river comes from a Pottawatomie word Sain-guee-mon (pronounced "sang gä mun") meaning "where there is plenty to eat."

Prior to being elected President of the United States, Abraham Lincoln represented Sangamon County in the Illinois Legislature. Lincoln, along with several other legislators, was instrumental in securing the Sangamon County seat, Springfield, as the state's capital. Sangamon County was also among the area represented by Lincoln when he served in the US House of Representatives.


1900= 71593
1910= 91024
1920= 100262
1930= 111733
1940= 117912
1950= 131484
1960= 146539
1970= 161335
1980= 176089
1990= 178386
2000= 188951
footnote= [ IL Counties 1900-1990]
As of the censusGR|2 of 2000, there were 188,951 people, 78,722 households, and 49,909 families residing in the county. The population density was 218 people per square mile (84/km²). There were 85,459 housing units at an average density of 98 per square mile (38/km²). The racial makeup of the county was 87.42% White, 9.65% Black or African American, 0.21% Native American, 1.10% Asian American, 0.03% Pacific Islander, 0.38% from other races, and 1.21% from two or more races. 1.06% of the population were Hispanic or Latino of any race. 25.8% were of German, 13.0% Irish, 11.3% English, 9.9% American and 6.2% Italian ancestry according to Census 2000.

There were 78,722 households out of which 30.50% had children under the age of 18 living with them, 48.20% were married couples living together, 11.70% had a female householder with no husband present, and 36.60% were non-families. 31.00% of all households were made up of individuals and 10.60% had someone living alone who was 65 years of age or older. The average household size was 2.36 and the average family size was 2.97.

In the county the population was spread out with 25.00% under the age of 18, 8.10% from 18 to 24, 29.70% from 25 to 44, 23.70% from 45 to 64, and 13.50% who were 65 years of age or older. The median age was 37 years. For every 100 females there were 91.40 males. For every 100 females age 18 and over, there were 87.30 males.

The median income for a household in the county was $42,957, and the median income for a family was $53,900. Males had a median income of $37,696 versus $28,814 for females. The per capita income for the county was $23,173. About 6.50% of families and 9.30% of the population were below the poverty line, including 12.70% of those under age 18 and 7.30% of those age 65 or over.

Cities and towns

*Clear Lake
*Leland Grove
*New Berlin
*Pleasant Plains
*Southern View

Unincorporated communities

*Buffalo Hart
*Ildes Park Place
*New City
*Old Berlin
*Riddle Hill


Sangamon County is divided into these townships:

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