| Name | Marshall County |
| State | Oklahoma |
| FIPS Code | 40095 |
| County Seat | Madill |
| Timezone | Central Daylight Time (CDT) |
| Population (2024) | 15,974 |
| Population Growth Rate(2020-2024) | 4.22% |
| Majority Ethnicity | White 72.88% |
| Public School Majority Ethnicity | White 42% |
| Partisan Voting Index | Strongly Republican:+33 |
| Unemployment Rate (May 2026) | 5.4% |
| Sales Tax Rate (2025) | 6.5% |
| Area Code(s) | 580 |
| Race/Ethnicity | Percentage of Population (2023) |
|---|---|
| White | 72.88% |
| African American | 0.96% |
| Hispanic | 19.04% |
| Asian | 0.27% |
| Native American | 6.7% |
| Hawaiin/Pacific Islander | 0.16% |
| Race/Ethnicity | Percentage of Public School Students (2023) |
|---|---|
| White | 41.67% |
| African American | 0.96% |
| Hispanic | 29.81% |
| Asian | 0.33% |
| Native American | 17.98% |
| Hawaiin/Pacific Islander | 0% |