Franklin County's 2026 population is estimated at 36,787, reflecting a -0.33% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Franklin County is the 36th largest county in Illinois. The 2010 population was 40,035 and has grown -8.11% since 2010.
Data after 2023 is projected based on recent change
Overall: 43.4 years
Female: 44.7 years
Male: 40.7 years
There are 29,083 adults, (7,835 of whom are seniors) in Franklin County.
Female: 18,783 (50.3%)
Male: 18,540 (49.7%)
The racial composition of Franklin County includes 94.71% White, and smaller percentages for other race, Black or African American, Asian, Native American and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 35,347 | 94.71% |
| Two or more races | 1,480 | 3.97% |
| Other race | 182 | 0.49% |
| Black or African American | 154 | 0.41% |
| Asian | 131 | 0.35% |
| Native American | 29 | 0.08% |
Franklin County 's average per capita income is $42,394. Household income levels show a median of $56,740. The poverty rate stands at 17.51%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $88,057 | $101,097 |
| Families | $71,222 | $89,339 |
| Households | $56,740 | $72,759 |
| Non Families | $29,484 | $41,869 |
Average Income
Median Household Income
Poverty Rate
