Atchison County | |
|---|---|
 | |
 Location within the U.S. state of Missouri | |
 Missouri's location within the U.S. | |
| Coordinates: 40°26′N 95°26′W / 40.43°N 95.43°W | |
| Country |  United States |
| State |  Missouri |
| Founded | February 14, 1845 |
| Named for | David Rice Atchison |
| Seat | Rock Port |
| Largest city | Tarkio |
| Area | |
| • Total | 550 sq mi (1,400 km2) |
| • Land | 547 sq mi (1,420 km2) |
| • Water | 2.8 sq mi (7 km2) 0.5% |
| Population (2020) | |
| • Total | 5,305 |
| • Density | 9.6/sq mi (3.7/km2) |
| Time zone | UTC−6 (Central) |
| • Summer (DST) | UTC−5 (CDT) |
| Congressional district | 6th |
| Website | www |
Atchison County is the northwesternmost county in the U.S. state of Missouri. As of the 2020 census, the county had a population of 5,305.[1] Its county seat is Rock Port.[2] It was originally known as Allen County when it was detached from Holt County in 1843.[3] The county was officially organized on February 14, 1845, and named for U.S. Senator David Rice Atchison from Missouri.[4]
- ^ "2020 Population and Housing State Data". United States Census Bureau. Retrieved August 25, 2021.
- ^ "Find a County". National Association of Counties. Archived from the original on May 31, 2011. Retrieved June 7, 2011.
- ^ "Disappearing Missouri Names". The Kansas City Star. March 19, 1911. p. 15. Retrieved August 15, 2014 – via Newspapers.com.
- ^ Eaton, David Wolfe (1916). How Missouri Counties, Towns and Streams Were Named. The State Historical Society of Missouri. pp. 202.
