CITY · MA

What county is Worcester, MA in?

Worcester, MA is mostly in Worcester County. County FIPS code 25027, population 866,866 (2023 estimate).

County details

City: Worcester, Massachusetts
Primary county: Worcester County
FIPS code: 25027
County population: 866,866

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

Questions

What county is Worcester in?

Worcester, MA is mostly in Worcester County.

What is the county seat of Worcester 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.