Lake County's estimated 2026 population is 10,952 with a growth rate of -0.25% 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 -2.89% since that time.
Data after 2023 is projected based on recent change
The racial composition of Lake County includes 92.06% White, and smaller percentages for Two or more races, Native American, other race, Asian, Black or African American, Native Hawaiian or Pacific Islander and multiracial populations.
White (92.06%)
Two or more races (2.47%)
Native American (2.4%)
Other race (1.93%)
Asian (0.59%)
Black or African American (0.5%)
Native Hawaiian or Pacific Islander (0.05%)
Race | Population | Percentage (of total) |
|---|---|---|
| White | 10,175 | 92.06% |
| Two or more races | 273 | 2.47% |
| Native American | 265 | 2.4% |
| Other race | 213 | 1.93% |
| Asian | 65 | 0.59% |
| Black or African American | 55 | 0.5% |
| Native Hawaiian or Pacific Islander | 6 | 0.05% |
Married
Widowed
Divorced
Separated
Never Married
Lake County's average per capita income is $44,130. Household income levels show a median of $73,792. The poverty rate stands at 9.36%.
Name | Median | Mean |
|---|---|---|
| Married Families | $110,823 | - |
| Families | $95,347 | $118,465 |
| Households | $73,792 | $100,698 |
| Non Families | $46,622 | $70,040 |
Average Income
Median Household Income
Poverty Rate