COUNTY · MA
Essex County, Massachusetts
Essex County is a county in Massachusetts with FIPS code 25009 and an estimated population of 810,089 (Census 2023), 3rd largest of 14 in the state.
County facts
- Name
- Essex County
- State
- Massachusetts
- Type
- county
- FIPS code
- 25009
- State FIPS
- 25
- Population (2023)
- 810,089
- Change since 2020
- +0.3%
- State rank
- 3 of 14
Population is the Census Bureau’s Vintage 2023 estimate.
Questions
What is the FIPS code for Essex County?
Essex County, Massachusetts has the five-digit FIPS code 25009: 25 for the state and 009 for the county.
What state is Essex County in?
Essex 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.