| Name | Sullivan County |
| State | Missouri |
| FIPS Code | 29211 |
| County Seat | Milan |
| Timezone | Central Daylight Time (CDT) |
| Population (2024) | 5,841 |
| Population Growth Rate(2020-2024) | -2.5% |
| Majority Ethnicity | White 79.7% |
| Public School Majority Ethnicity | White 66% |
| Partisan Voting Index | Strongly Republican:+33 |
| Unemployment Rate (May 2026) | 5.1% |
| Sales Tax Rate (2025) | 6.98% |
| Area Code(s) | 660 |
| Race/Ethnicity | Percentage of Population (2023) |
|---|---|
| White | 79.7% |
| African American | 2.36% |
| Hispanic | 17.02% |
| Asian | 0.71% |
| Native American | 0.21% |
| Hawaiin/Pacific Islander | 0% |
| Race/Ethnicity | Percentage of Public School Students (2023) |
|---|---|
| White | 65.91% |
| African American | 3.58% |
| Hispanic | 28.53% |
| Asian | 0.56% |
| Native American | 0.28% |
| Hawaiin/Pacific Islander | 0.28% |