Douglas County's 2026 population is estimated at 20,006, reflecting a 0.46% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Douglas County is the 57th largest county in Illinois. The 2010 population was 19,977 and has grown 0.15% since 2010.
Data after 2023 is projected based on recent change
Overall: 38.7 years
Female: 39.3 years
Male: 37.3 years
There are 14,892 adults, (3,679 of whom are seniors) in Douglas County.
Female: 10,049 (50.9%)
Male: 9,702 (49.1%)
The racial composition of Douglas County includes 88.66% White, and smaller percentages for other race, Black or African American, Asian, Native American and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 17,512 | 88.66% |
| Two or more races | 1,294 | 6.55% |
| Other race | 535 | 2.71% |
| Black or African American | 282 | 1.43% |
| Asian | 82 | 0.42% |
| Native American | 46 | 0.23% |
Douglas County 's average per capita income is $47,438. Household income levels show a median of $77,320. The poverty rate stands at 8.47%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $101,003 | $116,485 |
| Families | $92,796 | $105,346 |
| Households | $77,320 | $92,377 |
| Non Families | $41,573 | $58,638 |
Average Income
Median Household Income
Poverty Rate
