De Witt County's 2026 population is estimated at 15,295, reflecting a -0.08% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). De Witt County is the 68th largest county in Illinois. The 2010 population was 16,589 and has grown -7.8% since 2010.
Data after 2023 is projected based on recent change
Overall: 43.7 years
Female: 44.5 years
Male: 42.6 years
There are 12,093 adults, (3,182 of whom are seniors) in De Witt County.
Female: 7,696 (50.1%)
Male: 7,677 (49.9%)
The racial composition of De Witt County includes 93.27% White, and smaller percentages for Black or African American, Native American, other race, Asian and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 14,339 | 93.27% |
| Two or more races | 726 | 4.72% |
| Black or African American | 168 | 1.09% |
| Native American | 67 | 0.44% |
| Other race | 43 | 0.28% |
| Asian | 30 | 0.2% |
De Witt County 's average per capita income is $50,954. Household income levels show a median of $71,678. The poverty rate stands at 9.97%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $108,131 | - |
| Families | $98,750 | $105,391 |
| Households | $71,678 | $86,800 |
| Non Families | $41,650 | $56,349 |
Average Income
Median Household Income
Poverty Rate
