| Name | Atchison County |
| State | Missouri |
| FIPS Code | 29005 |
| County Seat | Rock Port |
| Timezone | Central Daylight Time (CDT) |
| Population (2024) | 5,116 |
| Population Growth Rate(2020-2024) | -3.64% |
| Majority Ethnicity | White 97.18% |
| Public School Majority Ethnicity | White 96% |
| Partisan Voting Index | Strongly Republican:+30 |
| Unemployment Rate (May 2026) | 2.9% |
| Sales Tax Rate (2025) | 6.48% |
| Area Code(s) | 660 / 402 / 531 |
| Race/Ethnicity | Percentage of Population (2023) |
|---|---|
| White | 97.18% |
| African American | 0.38% |
| Hispanic | 1.86% |
| Asian | 0.18% |
| Native American | 0.32% |
| Hawaiin/Pacific Islander | 0.1% |
| Race/Ethnicity | Percentage of Public School Students (2023) |
|---|---|
| White | 95.56% |
| African American | 1.8% |
| Hispanic | 2.16% |
| Asian | 0.12% |
| Native American | 0.24% |
| Hawaiin/Pacific Islander | 0% |