CITY · FL

What county is Gainesville, FL in?

Gainesville, FL is mostly in Alachua County. County FIPS code 12001, population 285,994 (2023 estimate).

County details

City: Gainesville, Florida
Primary county: Alachua County
FIPS code: 12001
County population: 285,994

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

Questions

What county is Gainesville in?

Gainesville, FL is mostly in Alachua County.

What is the county seat of Alachua 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.