Lincoln County's 2026 population is estimated at 79,448, reflecting a 2.72% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Lincoln County is the 3rd largest county in South Dakota. The 2010 population was 45,185 and has grown 75.83% since 2010.
Data after 2023 is projected based on recent change
Overall: 35.9 years
Female: 36.2 years
Male: 35.5 years
There are 51,947 adults, (10,366 of whom are seniors) in Lincoln County.
Female: 35,712 (50.6%)
Male: 34,926 (49.4%)
The racial composition of Lincoln County includes 89.5% White, and smaller percentages for Black or African American, Asian, other race, Native American and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 63,223 | 89.5% |
| Two or more races | 3,261 | 4.62% |
| Black or African American | 1,691 | 2.39% |
| Asian | 1,230 | 1.74% |
| Other race | 872 | 1.23% |
| Native American | 361 | 0.51% |
Lincoln County 's average per capita income is $57,638. Household income levels show a median of $99,166. The poverty rate stands at 5.58%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $128,138 | - |
| Families | $114,036 | $154,174 |
| Households | $99,166 | $132,275 |
| Non Families | $62,108 | $77,102 |
Average Income
Median Household Income
Poverty Rate