Gregory County's estimated 2025 population is 4,056 with a growth rate of 0.47% in the past year according to the most recent United States census data. Gregory County is the 39th largest county in South Dakota. The 2010 population was 4,270 and has seen a growth of -5.01% since that time.
Data after 2023 is projected based on recent change
The racial composition of Gregory County includes 87.43% White, 5.61% Native American, and smaller percentages for Black or African American, Native Hawaiian or Pacific Islander, Asian and multiracial populations.
Race | Population | Percentage (of total) |
|---|---|---|
| White | 3,491 | 87.43% |
| Native American | 224 | 5.61% |
| Two or more races | 220 | 5.51% |
| Black or African American | 40 | 1% |
| Native Hawaiian or Pacific Islander | 13 | 0.33% |
| Asian | 5 | 0.13% |
Married
Widowed
Divorced
Separated
Never Married
Gregory County's average per capita income is $39,303. Household income levels show a median of $52,432. The poverty rate stands at 11.05%.
Name | Median | Mean |
|---|---|---|
| Married Families | $87,458 | - |
| Families | $76,750 | $94,153 |
| Households | $52,432 | $73,414 |
| Non Families | $32,227 | $40,255 |
Average Income
Median Household Income
Poverty Rate