How many people live in De Witt County, IL?
Updated Apr. 6, 2026Refreshed annually
In 2024, there were about 15,300 people living in De Witt County, IL. That makes De Witt County the 69th-most populous county in Illinois. It is home to 0.12% of people living in the state.
15.3K
population of De Witt County, IL (2024)
0.12%
County share of the Illinois population (2024)
About 15,300 people lived in De Witt County, IL in 2024.
Population estimates, 2000–2024
What are De Witt County, IL’s age demographics?
About 3,300 De Witt County, IL residents are aged 65 and older in 2024. That represents 21.7% of its population. For comparison, the age group represents 17.9% of Illinois' population and 18% in the US overall.
Another 3,200 De Witt County residents, or 20.9% of the population, were children under 18. For comparison, the age group represents 21.2% of Illinois’s population and 21.6% in the US overall.
A higher share of De Witt County, IL's population is aged 65 or older than the US as a whole.
Population estimates by age group, (2024)
What are De Witt County, IL’s racial and ethnic demographics?
Non-Hispanic white residents make up 92.5% of the De Witt County population, higher than the national share of 57.5%.
In contrast, De Witt County’s Hispanic population accounts for 3.8%, below the 20% nationwide, and the non-Hispanic Black or African American population makes up 1.2% of the county, compared with 12.6% nationally.
Racial and ethnic make up differ based on location. These figures reflect how people identified their race alone (not in combination with other races), and separate out Hispanic or Latino ethnicity, following Census reporting standards.
De Witt County, IL has a higher share of a non-Hispanic white population than Illinois as a whole.
Population estimates by race and ethnicity, (2024)
The largest city or town in De Witt County, IL is Clinton with about 6,600 residents in 2024.
Cities and towns in De Witt County, IL ranked by population
Population (2024), includes only portions within county
| City or town | Population | |
|---|---|---|
| 1. | Clinton (pt.) | 6,621 |
| 2. | Farmer City | 1,817 |
| 3. | Wapella | 503 |
| 4. | Creek | 484 |
| 5. | Waynesville | 376 |
| 6. | Barnett | 364 |
| 7. | Weldon | 359 |
| 8. | Kenney | 306 |
| 9. | Harp | 295 |
| 10. | Clinton (pt.) | 260 |
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Methodology
USAFacts standardizes data, in areas such as time and demographics, to make it easier to understand and compare.
The analysis was generated with the help of AI and reviewed by USAFacts for accuracy.
Page sources
USAFacts endeavors to share the most up-to-date information available. We sourced the data on this page directly from government agencies; however, the intervals at which agencies publish updated data vary.
