| Name | Martin County |
| State | Minnesota |
| FIPS Code | 27091 |
| County Seat | Fairmont |
| Timezone | Central Standard Time (CST) |
| Population (2022) | 20,727 |
| Population Growth Rate(2000-2022) | -3.91% |
| Majority Ethnicity | White 98.65% |
| Public School Majority Ethnicity | White 80% |
| Partisan Voting Index | Republican:+20 |
| Unemployment Rate (February 2025) | 2.5% |
| Area Code(s) | 507 |
| Race/Ethnicity | Percentage of Population (2022) |
|---|---|
| White | 98.65% |
| African American | 0.64% |
| Hispanic | 0.18% |
| Asian | 0.51% |
| Native American | 0.01% |
| Hawaiin/Pacific Islander | 0.01% |
| 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% |