Sully County's estimated 2025 population is 1,518 with a growth rate of 0.8% in the past year according to the most recent United States census data. Sully County is the 62nd largest county in South Dakota. The 2010 population was 1,377 and has seen a growth of 10.24% since that time.
Data after 2023 is projected based on recent change
The racial composition of Sully County includes 92.51% White, 5% Black or African American, and smaller percentages for Two or more races, other race, Native American, Asian, Native Hawaiian or Pacific Islander and multiracial populations.
White
Black or African American
Two or more races
Other race
Native American
Asian
Native Hawaiian or Pacific Islander
Race | Population | Percentage (of total) |
|---|---|---|
| White | 1,370 | 92.51% |
| Black or African American | 74 | 5% |
| Two or more races | 29 | 1.96% |
| Other race | 8 | 0.54% |
| Native American | 0 | 0% |
| Asian | 0 | 0% |
| Native Hawaiian or Pacific Islander | 0 | 0% |
Married
Widowed
Divorced
Separated
Never Married
Sully County's average per capita income is $46,304. Household income levels show a median of $70,250. The poverty rate stands at 7.94%.
Name | Median | Mean |
|---|---|---|
| Married Families | $103,438 | - |
| Families | $95,673 | $122,258 |
| Households | $70,250 | $106,129 |
| Non Families | $53,160 | $80,024 |
Average Income
Median Household Income
Poverty Rate