CITY · SC

What county is Columbia, SC in?

Columbia, SC is mostly in Richland County. County FIPS code 45079, population 425,138 (2023 estimate).

County details

City: Columbia, South Carolina
Primary county: Richland County
FIPS code: 45079
County population: 425,138

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

Questions

What county is Columbia in?

Columbia, SC is mostly in Richland County.

What is the county seat of Richland 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.