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De Witt County, Illinois
Map of Illinois highlighting De Witt County
Location in the state of Illinois
Map of the U.S. highlighting Illinois
Illinois's location in the U.S.
Founded 1839
Seat Clinton
Largest city Clinton
 - Total
 - Land
 - Water

405 sq mi (1,049 km²)
398 sq mi (1,030 km²)
8 sq mi (20 km²), 1.87%
 - (2000)
 - Density

42/sq mi (16/km²)
Time zone Central: UTC-6/-5

DeWitt County is a county located in the U.S. state of Illinois. As of 2000, the population is 16,798. Its name is in honor of the seventh Governor of New York State, DeWitt Clinton. Its county seat is Clinton6. The U.S. Census Bureau and the USGS list the county's name as De Witt, although the county uses the name DeWitt (no space). The County was formed in 1839 from Macon and McLean Counties.


According to the U.S. Census Bureau, the county has a total area of 1,049 km² (405 sq mi). 1,030 km² (398 sq mi) of it is land and 20 km² (8 sq mi) of it (1.87%) is water.

Adjacent Counties[]


2000 census age pyramid for DeWitt County.

Historical populations
Census Pop.
1900 18,972
1910 18,906 −0.3%
1920 19,252 1.8%
1930 18,598 −3.4%
1940 18,244 −1.9%
1950 16,894 −7.4%
1960 17,253 2.1%
1970 16,975 −1.6%
1980 18,108 6.7%
1990 16,516 −8.8%
2000 16,798 1.7%
IL Counties 1900-1990

As of the census2 of 2000, there were 16,798 people, 6,770 households, and 4,684 families residing in the county. The population density was 16/km² (42/sq mi). There were 7,282 housing units at an average density of 7/km² (18/sq mi). The racial makeup of the county was 97.81% White, 0.49% Black or African American, 0.19% Native American, 0.28% Asian, 0.02% Pacific Islander, 0.50% from other races, and 0.71% from two or more races. 1.27% of the population were Hispanic or Latino of any race.

There were 6,770 households out of which 30.90% had children under the age of 18 living with them, 56.80% were married couples living together, 8.50% had a female householder with no husband present, and 30.80% were non-families. 26.80% of all households were made up of individuals and 12.60% had someone living alone who was 65 years of age or older. The average household size was 2.44 and the average family size was 2.95.

In the county the population was spread out with 24.60% under the age of 18, 7.80% from 18 to 24, 28.30% from 25 to 44, 23.50% from 45 to 64, and 15.90% who were 65 years of age or older. The median age was 38 years. For every 100 females there were 95.60 males. For every 100 females age 18 and over, there were 93.50 males.

The median income for a household in the county was $41,256, and the median income for a family was $50,429. Males had a median income of $35,902 versus $23,998 for females. The per capita income for the county was $20,488. About 5.80% of families and 8.20% of the population were below the poverty line, including 11.90% of those under age 18 and 7.20% of those age 65 or over.

Cities and towns[]

Map of DeWitt County Illinois.

External links[]

This page uses content from the English language Wikipedia. The original content was at DeWitt 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.