CITY · KS

What county is Kansas City, KS in?

Kansas City, KS is mostly in Wyandotte County. County FIPS code 20209, population 165,281 (2023 estimate).

County details

City: Kansas City, Kansas
Primary county: Wyandotte County
FIPS code: 20209
County population: 165,281

Some cities extend into more than one county. Kansas City is placed in the county that contains its center. For a specific address, use the address lookup.

Questions

What county is Kansas City in?

Kansas City, KS is mostly in Wyandotte County.

What is the county seat of Wyandotte County?

County seats are not part of the data on this site. Check the county’s official website.

Can a city be in two counties?

Yes. Large cities such as Houston and Atlanta cross county lines. The address lookup shows the exact county for any street address.

Sources: U.S. Census Bureau geographic reference files; FCC Area API; Census Bureau Population Estimates, Vintage 2023. Last reviewed 2026-10-27.