COUNTY · MA
Worcester County, Massachusetts
Worcester County is a county in Massachusetts with FIPS code 25027 and an estimated population of 866,866 (Census 2023), 2nd largest of 14 in the state.
County facts
- Name
- Worcester County
- State
- Massachusetts
- Type
- county
- FIPS code
- 25027
- State FIPS
- 25
- Population (2023)
- 866,866
- Change since 2020
- +0.8%
- State rank
- 2 of 14
Population is the Census Bureau’s Vintage 2023 estimate.
Major cities in Worcester County
Other counties in Massachusetts
Questions
What is the FIPS code for Worcester County?
Worcester County, Massachusetts has the five-digit FIPS code 25027: 25 for the state and 027 for the county.
What state is Worcester County in?
Worcester County is in Massachusetts.
How do I know if an address is in this county?
Use the address lookup. ZIP codes and city names can cross county lines, so an address is the reliable check.
Sources: U.S. Census Bureau geographic reference files; Census Bureau Population Estimates, Vintage 2023. Last reviewed 2026-10-27.