Sullivan County's estimated 2026 population is 20,969 with a growth rate of 0.66% in the past year according to the most recent United States census data. Sullivan County is the 69th largest county in Indiana. The 2010 population was 21,387 and has seen a growth of -1.95% since that time.
Data after 2023 is projected based on recent change
Overall: 41.7 years
Female: 44.8 years
Male: 40.1 years
There are 16,873 adults, (3,937 of whom are seniors) in Sullivan County.
Female: 9,284 (44.7%)
Male: 11,496 (55.3%)
The racial composition of Sullivan County includes 90.66% White, 3.01% Black or African American, and smaller percentages for other race, Asian, Native American and multiracial populations.
Race | Population | Percentage (of total) |
|---|---|---|
| White | 18,839 | 90.66% |
| Two or more races | 1,066 | 5.13% |
| Black or African American | 625 | 3.01% |
| Other race | 153 | 0.74% |
| Asian | 80 | 0.38% |
| Native American | 17 | 0.08% |
Sullivan County's average per capita income is $37,285. Household income levels show a median of $56,204. The poverty rate stands at 13.85%.
Name | Median | Mean |
|---|---|---|
| Married Families | $82,069 | $98,067 |
| Families | $72,848 | $88,018 |
| Households | $56,204 | $75,919 |
| Non Families | $33,726 | $50,829 |
Average Income
Median Household Income
Poverty Rate
