Sullivan is a city located in Sullivan County, Indiana. Sullivan has a 2025 population of 4,235 . It is also the county seat of Sullivan County . Sullivan is currently declining at a rate of -0.12% annually and its population has decreased by -0.56% since the most recent census, which recorded a population of 4,259 in 2020.
The average household income in Sullivan is $52,074 with a poverty rate of 20.61%. The median age in Sullivan is 32.9 years: 25.3 years for males, and 35.9 years for females. For every 100 females there are 88.3 males.
Data after 2023 is projected based on recent change
The racial composition of Sullivan includes 92.99% White, and smaller percentages for other race, Black or African American and multiracial populations.
White (92.99%)
Two or more races (6.24%)
Other race (0.68%)
Black or African American (0.09%)
Race | Population | Percentage (of total) |
|---|---|---|
| White | 3,952 | 92.99% |
| Two or more races | 265 | 6.24% |
| Other race | 29 | 0.68% |
| Black or African American | 4 | 0.09% |
Married
Widowed
Divorced
Separated
Never Married
Sullivan's average per capita income is $32,045. Household income levels show a median of $44,313. The poverty rate stands at 20.61%.
Name | Median | Mean |
|---|---|---|
| Married Families | $68,955 | - |
| Families | $53,790 | $58,856 |
| Households | $44,313 | $52,074 |
| Non Families | $29,482 | $35,450 |
Average Income
Median Household Income
Poverty Rate