Sullivan County's estimated 2026 population is 20,660 with a growth rate of -0.26% in the past year according to the most recent United States census data. Sullivan County is the 70th largest county in Indiana. The 2010 population was 21,387 and has seen a growth of -3.4% since that time.
Data after 2023 is projected based on recent change
The racial composition of Sullivan County includes 91.07% White, 3.36% Black or African American, and smaller percentages for other race, Asian, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
White (91.07%)
Two or more races (4.1%)
Black or African American (3.36%)
Other race (0.72%)
Asian (0.66%)
Native American (0.07%)
Native Hawaiian or Pacific Islander (0.01%)
Race | Population | Percentage (of total) |
|---|---|---|
| White | 18,912 | 91.07% |
| Two or more races | 852 | 4.1% |
| Black or African American | 698 | 3.36% |
| Other race | 149 | 0.72% |
| Asian | 138 | 0.66% |
| Native American | 14 | 0.07% |
| Native Hawaiian or Pacific Islander | 3 | 0.01% |
Married
Widowed
Divorced
Separated
Never Married
Sullivan County's average per capita income is $36,184. Household income levels show a median of $54,985. The poverty rate stands at 13.47%.
Name | Median | Mean |
|---|---|---|
| Married Families | $80,330 | - |
| Families | $70,470 | $81,827 |
| Households | $54,985 | $74,197 |
| Non Families | $34,779 | $55,400 |
Average Income
Median Household Income
Poverty Rate
