Lake County's estimated 2026 population is 10,942 with a growth rate of -0.46% in the past year according to the most recent United States census data. Lake County is the 16th largest county in South Dakota. The 2010 population was 11,278 and has seen a growth of -2.98% since that time.
Data after 2023 is projected based on recent change
Overall: 43.8 years
Female: 45 years
Male: 42.7 years
There are 8,826 adults, (2,666 of whom are seniors) in Lake County.
Female: 5,181 (47.2%)
Male: 5,791 (52.8%)
The racial composition of Lake County includes 90.94% White, and smaller percentages for other race, Native American, Two or more races, Asian, Black or African American, Native Hawaiian or Pacific Islander and multiracial populations.
Race | Population | Percentage (of total) |
|---|---|---|
| White | 9,978 | 90.94% |
| Other race | 278 | 2.53% |
| Native American | 276 | 2.52% |
| Two or more races | 260 | 2.37% |
| Asian | 81 | 0.74% |
| Black or African American | 80 | 0.73% |
| Native Hawaiian or Pacific Islander | 19 | 0.17% |
Lake County's average per capita income is $46,963. Household income levels show a median of $76,808. The poverty rate stands at 8.36%.
Name | Median | Mean |
|---|---|---|
| Married Families | $108,938 | - |
| Families | $97,647 | $127,336 |
| Households | $76,808 | $104,754 |
| Non Families | $47,636 | $67,910 |
Average Income
Median Household Income
Poverty Rate