| County: | DeWitt County |
| State: | Illinois |
| Founded: | 1839 |
| Seat Wl: | Clinton |
| Largest City Wl: | Clinton |
| Area Total Sq Mi: | 405 |
| Area Land Sq Mi: | 398 |
| Area Water Sq Mi: | 7.6 |
| Area Percentage: | 1.9 |
| Population As Of: | 2020 |
| Population Total: | 15516 |
| Population Density Sq Mi: | auto |
| Time Zone: | Central |
| Web: | www.dewittcountyill.com |
| District: | 15th |
| Ex Image: | DeWitt County Courthouse, Clinton.jpg |
| Ex Image Cap: | DeWitt County Courthouse in Clinton |
DeWitt County is a county located in the U.S. state of Illinois. As of the 2020 census, the population was 15,516.[1] Its county seat is Clinton.[2] The county was formed on March 1, 1839, from Macon and McLean counties. The county was named in honor of the seventh Governor of New York State, DeWitt Clinton.[3]
DeWitt County is included in Bloomington–Normal, IL Metropolitan Statistical Area.
The U.S. Census Bureau and the U.S. Geological Survey (USGS) list the county's name as De Witt, although the county uses the name DeWitt (no space).
According to the U.S. Census Bureau, the county has a total area of, of which is land and (1.9%) is water.
In recent years, average temperatures in the county seat of Clinton have ranged from a low of in January to a high of in July, although a record low of was recorded in February 1905 and a record high of was recorded in July 1954. Average monthly precipitation ranged from in February to in July.
As of the 2010 United States Census, there were 16,561 people, 6,811 households, and 4,618 families residing in the county.[4] The population density was . There were 7,521 housing units at an average density of .[5] The racial makeup of the county was 96.8% white, 0.5% black or African American, 0.4% Asian, 0.2% American Indian, 0.9% from other races, and 1.2% from two or more races. Those of Hispanic or Latino origin made up 2.1% of the population.[4] In terms of ancestry, 31.2% were American, 21.7% were German, 15.8% were English, and 12.3% were Irish.[6]
Of the 6,811 households, 30.1% had children under the age of 18 living with them, 53.0% were married couples living together, 10.0% had a female householder with no husband present, 32.2% were non-families, and 27.5% of all households were made up of individuals. The average household size was 2.39 and the average family size was 2.88. The median age was 41.7 years.[4]
The median income for a household in the county was $45,347 and the median income for a family was $56,806. Males had a median income of $41,649 versus $27,729 for females. The per capita income for the county was $24,320. About 6.4% of families and 8.6% of the population were below the poverty line, including 12.2% of those under age 18 and 6.6% of those age 65 or over.[7]
DeWitt County is divided into thirteen townships:
DeWitt is frequently a Republican county. It has not been carried by a Democratic presidential candidate since Lyndon Johnson’s 1964 landslide, and even before that it was carried by Democrats only in strong winning elections like 1936, 1932, 1916, 1912 and 1892.
K-12 school districts include:[8]
There are also an elementary school district, Chester-East Lincoln Community Csd 61, and a secondary school district, Lincoln Community High School District 404.[8]