McCook County's estimated 2026 population is 5,695 with a growth rate of -0.66% in the past year according to the most recent United States census data. McCook County is the 31st largest county in South Dakota. The 2010 population was 5,609 and has seen a growth of 1.53% since that time.
Data after 2023 is projected based on recent change
The racial composition of McCook County includes 94.92% White, and smaller percentages for Two or more races, Native American, other race, Black or African American and multiracial populations.
White (94.92%)
Two or more races (2.65%)
Native American (1.4%)
Other race (0.75%)
Black or African American (0.28%)
Race | Population | Percentage (of total) |
|---|---|---|
| White | 5,441 | 94.92% |
| Two or more races | 152 | 2.65% |
| Native American | 80 | 1.4% |
| Other race | 43 | 0.75% |
| Black or African American | 16 | 0.28% |
Married
Widowed
Divorced
Separated
Never Married
McCook County's average per capita income is $50,538. Household income levels show a median of $80,847. The poverty rate stands at 7.4%.
Name | Median | Mean |
|---|---|---|
| Married Families | $102,639 | - |
| Families | $96,852 | $113,799 |
| Households | $80,847 | $97,710 |
| Non Families | $49,844 | $62,784 |
Average Income
Median Household Income
Poverty Rate