Lyman County's estimated 2026 population is 3,696 with a growth rate of 0.05% 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 -1.73% since that time.
Data after 2023 is projected based on recent change
Overall: 36.1 years
Female: 36.2 years
Male: 36.1 years
There are 2,681 adults, (682 of whom are seniors) in Lyman County.
Female: 1,776 (47.7%)
Male: 1,948 (52.3%)
The racial composition of Lyman County includes 57.89% White, 39.39% Native American, and smaller percentages for Two or more races, Native Hawaiian or Pacific Islander, other race, Black or African American, Asian and multiracial populations.
Race | Population | Percentage (of total) |
|---|---|---|
| White | 2,156 | 57.89% |
| Native American | 1,467 | 39.39% |
| Two or more races | 74 | 1.99% |
| Native Hawaiian or Pacific Islander | 13 | 0.35% |
| Other race | 12 | 0.32% |
| Black or African American | 1 | 0.03% |
| Asian | 1 | 0.03% |
Lyman County's average per capita income is $48,693. Household income levels show a median of $67,143. The poverty rate stands at 23.65%.
Name | Median | Mean |
|---|---|---|
| Married Families | $104,833 | - |
| Families | $82,946 | $123,410 |
| Households | $67,143 | $99,810 |
| Non Families | $43,295 | $51,580 |
Average Income
Median Household Income
Poverty Rate