COUNTY · KS
Ottawa County, Kansas
Ottawa County is a county in Kansas with FIPS code 20143 and an estimated population of 5,818 (Census 2023), 59th largest of 105 in the state.
County facts
- Name
- Ottawa County
- State
- Kansas
- Type
- county
- FIPS code
- 20143
- State FIPS
- 20
- Population (2023)
- 5,818
- Change since 2020
- +1.6%
- State rank
- 59 of 105
Population is the Census Bureau’s Vintage 2023 estimate.
Questions
What is the FIPS code for Ottawa County?
Ottawa County, Kansas has the five-digit FIPS code 20143: 20 for the state and 143 for the county.
What state is Ottawa County in?
Ottawa County is in Kansas.
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.