Martin County's 2026 population is estimated at 19,227, reflecting a -0.86% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Martin County is the 49th largest county in Minnesota. The 2010 population was 20,805 and has grown -7.58% since 2010.
Data after 2023 is projected based on recent change
Overall: 43.9 years
Female: 43.8 years
Male: 44 years
There are 15,265 adults, (4,866 of whom are seniors) in Martin County.
Female: 9,933 (50.2%)
Male: 9,847 (49.8%)
The racial composition of Martin County includes 92.53% White, and smaller percentages for other race, Black or African American, Asian, Native American and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 18,303 | 92.53% |
| Two or more races | 844 | 4.27% |
| Other race | 314 | 1.59% |
| Black or African American | 169 | 0.85% |
| Asian | 101 | 0.51% |
| Native American | 49 | 0.25% |
Martin County 's average per capita income is $44,815. Household income levels show a median of $59,507. The poverty rate stands at 13.13%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $99,544 | - |
| Families | $81,651 | $103,969 |
| Households | $59,507 | $82,458 |
| Non Families | $37,839 | $48,477 |
Average Income
Median Household Income
Poverty Rate
