| Name | Barton County |
| State | Missouri |
| FIPS Code | 29011 |
| County Seat | Lamar |
| Timezone | Central Daylight Time (CDT) |
| Population (2024) | 11,743 |
| Population Growth Rate(2020-2024) | 0.89% |
| Majority Ethnicity | White 95.6% |
| Public School Majority Ethnicity | White 90% |
| Partisan Voting Index | Strongly Republican:+37 |
| Unemployment Rate (May 2026) | 3.6% |
| Sales Tax Rate (2025) | 6.48% |
| Area Code(s) | 417 |
| Race/Ethnicity | Percentage of Population (2023) |
|---|---|
| White | 95.6% |
| African American | 0.22% |
| Hispanic | 2.86% |
| Asian | 0.02% |
| Native American | 1.3% |
| Hawaiin/Pacific Islander | 0% |
| Race/Ethnicity | Percentage of Public School Students (2023) |
|---|---|
| White | 89.87% |
| African American | 0.48% |
| Hispanic | 4.46% |
| Asian | 0.36% |
| Native American | 0.9% |
| Hawaiin/Pacific Islander | 0.12% |