Lyman County's estimated 2026 population is 3,723 with a growth rate of 0.03% in the past year according to the most recent United States census data. Lyman County is the 43rd largest county in South Dakota. The 2010 population was 3,761 and has seen a growth of -1.01% since that time.
Data after 2023 is projected based on recent change
The racial composition of Lyman County includes 57.44% White, 40.27% Native American, and smaller percentages for Two or more races, other race, Asian and multiracial populations.
White (57.44%)
Native American (40.27%)
Two or more races (1.61%)
Other race (0.65%)
Asian (0.03%)
Race | Population | Percentage (of total) |
|---|---|---|
| White | 2,135 | 57.44% |
| Native American | 1,497 | 40.27% |
| Two or more races | 60 | 1.61% |
| Other race | 24 | 0.65% |
| Asian | 1 | 0.03% |
Married
Widowed
Divorced
Separated
Never Married
Lyman County's average per capita income is $44,871. Household income levels show a median of $61,169. The poverty rate stands at 24.59%.
Name | Median | Mean |
|---|---|---|
| Married Families | $87,813 | - |
| Families | $68,750 | $96,555 |
| Households | $61,169 | $80,098 |
| Non Families | $40,729 | $48,297 |
Average Income
Median Household Income
Poverty Rate