| Name | Martin County |
| State | Minnesota |
| FIPS Code | 27091 |
| County Seat | Fairmont |
| Timezone | Central Daylight Time (CDT) |
| Population (2024) | 19,728 |
| Population Growth Rate(2020-2024) | -1.54% |
| Majority Ethnicity | White 91.64% |
| Public School Majority Ethnicity | White 80% |
| Partisan Voting Index | Republican:+20 |
| Unemployment Rate (May 2026) | 5.2% |
| Sales Tax Rate (2025) | 6.88% |
| Area Code(s) | 507 |
| Race/Ethnicity | Percentage of Population (2023) |
|---|---|
| White | 91.64% |
| African American | 0.79% |
| Hispanic | 6.7% |
| Asian | 0.56% |
| Native American | 0.31% |
| Hawaiin/Pacific Islander | 0% |
| Race/Ethnicity | Percentage of Public School Students (2023) |
|---|---|
| White | 79.75% |
| African American | 0.98% |
| Hispanic | 15.36% |
| Asian | 0.32% |
| Native American | 0.38% |
| Hawaiin/Pacific Islander | 0.25% |