CITY · MD

What county is Baltimore, MD in?

Baltimore, MD is mostly in Baltimore city. County FIPS code 24510, population 565,239 (2023 estimate).

County details

City: Baltimore, Maryland
Primary county: Baltimore city
FIPS code: 24510
County population: 565,239

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

Questions

What county is Baltimore in?

Baltimore, MD is mostly in Baltimore city.

What is the county seat of Baltimore city?

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.