Sangamon County, Illinois
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|Sangamon County, Illinois|
Location in the state of Illinois
Illinois's location in the U.S.
877.02 sq mi (2,271 km²)
868.30 sq mi (2,249 km²)
8.72 sq mi (23 km²), 0.99%
218/sq mi (84/km²)
Sangamon County is a county located in the U.S. state of Illinois. According to the 2010 census, it has a population of 197,465, which is an increase of 4.5% from 188,951 in 2000. Its county seat is Springfield, the state capital.
According to the 2010 census, the county has a total area of 877.02 square miles (2,271.5 km2), of which 868.30 square miles (2,248.9 km2) (or 99.01%) is land and 8.72 square miles (22.6 km2) (or 0.99%) is water.
Major highways 
- Interstate 55
- Interstate 72
- U.S. Highway 36
- Illinois Route 4
- Illinois Route 29
- Illinois Route 54
- Illinois Route 97
- Illinois Route 104
- Illinois Route 124
- Illinois Route 123
- Illinois Route 125
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
Protected areas 
Federal Protected Areas 
State Protected Areas 
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 origin of the name of the river is unknown; among several explanations is the theory that is comes from the 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. Another legislator who represented Sangamon County was Colonel Edmund Dick Taylor, also known as "Father of the Greenback". The prominent financiers and industrialists Jacob Bunn and John Whitfield Bunn were based in Springfield, Sangamon County, Illinois, as well as in Chicago, during the nineteenth century and the early twentieth century. The careers of these men and the people with whom they collaborated helped to shape much of the history and development of Sangamon County, Illinois.
|IL Counties 1900-1990|
As of the census of 2008, there were 194,925 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.
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.
Sangamon County is governed by a 29 member board. Each member of the board is elected from a separate district.
Other elected officials include:
- Clerk of the Circuit Court
- County Clerk
- State's Attorney
- Superintendent of Schools
Cities and towns 
Unincorporated communities 
Sangamon County is divided into these townships:
Climate and weather 
|Climate chart (explanation)|
In recent years, average temperatures in the county seat of Springfield have ranged from a low of 17 °F (−8 °C) in January to a high of 87 °F (31 °C) in July, although a record low of −24 °F (−31 °C) was recorded in February 1905 and a record high of 112 °F (44 °C) was recorded in July 1954. Average monthly precipitation ranged from 1.62 inches (41 mm) in January to 4.06 inches (103 mm) in May.
See also 
- "Sangamon County QuickFacts". United States Census Bureau. Retrieved 2011-11-05.
- "Census 2010 U.S. Gazetteer Files: Counties". United States Census. Retrieved 2011-11-05.
- Callary, Edward. 2009. Place Names of Illinois. Champaign: University of Illinois Press, p. 310.
- "American FactFinder". United States Census Bureau. Retrieved 2008-01-31.
- "History and Overview". Springfield, Illinois: County of Sangamon, Illinois. Retrieved 4 December 2011.
- "Monthly Averages for Springfield, Illinois". The Weather Channel. Retrieved 2011-01-27.
|Wikimedia Commons has media related to: Sangamon County, Illinois|
||Menard County and Logan County|
|Morgan County and Cass County||Macon County|
|Montgomery County and Macoupin County||Christian County|