COUNTY · MO
Atchison County, Missouri
Atchison County is a county in Missouri with FIPS code 29005 and an estimated population of 5,107 (Census 2023), 108th largest of 115 in the state.
County facts
- Name
- Atchison County
- State
- Missouri
- Type
- county
- FIPS code
- 29005
- State FIPS
- 29
- Population (2023)
- 5,107
- Change since 2020
- -3.8%
- State rank
- 108 of 115
Population is the Census Bureau’s Vintage 2023 estimate.
Questions
What is the FIPS code for Atchison County?
Atchison County, Missouri has the five-digit FIPS code 29005: 29 for the state and 005 for the county.
What state is Atchison County in?
Atchison County is in Missouri.
How do I know if an address is in this county?
Use the address lookup. ZIP codes and city names can cross county lines, so an address is the reliable check.
Sources: U.S. Census Bureau geographic reference files; Census Bureau Population Estimates, Vintage 2023. Last reviewed 2026-10-27.