How many people live in Henderson County, IL?
Updated Apr. 6, 2026Refreshed annually
In 2024, there were about 6,000 people living in Henderson County, IL. That makes Henderson County the 92nd-most populous county in Illinois. It is home to 0.05% of people living in the state.
6.05K
population of Henderson County, IL (2024)
0.05%
County share of the Illinois population (2024)
About 6,000 people lived in Henderson County, IL in 2024.
Population estimates, 2000–2024
What are Henderson County, IL’s age demographics?
About 1,800 Henderson County, IL residents are aged 65 and older in 2024. That represents 29.3% of its population. For comparison, the age group represents 17.9% of Illinois’ population and 18% in the US overall.
Another 1,100 Henderson County residents, or 18.6% of the population, were children under 18. For comparison, the age group represents 21.2% of Illinois’ population and 21.6% in the US overall.
A higher share of Henderson County, IL's population is aged 65 or older than the US as a whole.
Population estimates by age group, (2024)
What are Henderson County, IL’s racial and ethnic demographics?
Non-Hispanic white residents make up 94.2% of the Henderson County, IL population, higher than the national share of 57.5%.
In contrast, Henderson County’s Hispanic population accounts for 2.3%, below the 20% nationwide, and the non-Hispanic Black or African American population makes up 0.78% 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.
Henderson 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 Henderson County, IL is Oquawka with about 1,100 residents in 2024.
Cities and towns in Henderson County, IL ranked by population
Population (2024), includes only portions within county
| City or town | Population | |
|---|---|---|
| 1. | Oquawka | 1,074 |
| 2. | Stronghurst (pt.) | 697 |
| 3. | Lomax | 379 |
| 4. | Biggsville | 287 |
| 5. | Rozetta | 224 |
| 6. | Gladstone | 221 |
| 7. | Bald Bluff | 210 |
| 8. | Terre Haute | 207 |
| 9. | Dallas City (pt.) | 158 |
| 10. | Media | 111 |
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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.
