CITY · ME

What county is Portland, ME in?

Portland, ME is mostly in Oxford County. County FIPS code 23017, population 59,905 (2023 estimate).

County details

City: Portland, Maine
Primary county: Oxford County
FIPS code: 23017
County population: 59,905

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

Questions

What county is Portland in?

Portland, ME is mostly in Oxford County.

What is the county seat of Oxford 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.