Brown County's 2026 population is estimated at 6,319, reflecting a 0.1% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Brown County is the 91st largest county in Illinois. The 2010 population was 6,919 and has grown -8.67% since 2010.
Data after 2023 is projected based on recent change
Overall: 41 years
Female: 42.8 years
Male: 40.7 years
There are 5,260 adults, (1,029 of whom are seniors) in Brown County.
Female: 2,282 (36.1%)
Male: 4,040 (63.9%)
The racial composition of Brown County includes 74.52% White, 17.91% Black or African American, 3.73% other race, and smaller percentages for Native American, Asian and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 4,711 | 74.52% |
| Black or African American | 1,132 | 17.91% |
| Other race | 236 | 3.73% |
| Two or more races | 229 | 3.62% |
| Native American | 11 | 0.17% |
| Asian | 3 | 0.05% |
Brown County 's average per capita income is $45,740. Household income levels show a median of $67,917. The poverty rate stands at 9.25%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $89,333 | - |
| Families | $85,302 | $96,502 |
| Households | $67,917 | $81,732 |
| Non Families | $42,350 | $58,375 |
Average Income
Median Household Income
Poverty Rate