Boston-Cambridge-Newton, MA-NH metro area ZIP codes
The Boston-Cambridge-Newton, MA-NH metropolitan statistical area (CBSA 14460) covers 7 counties in Massachusetts and New Hampshire and 391 ZIP codes.
- ZIP codes
- 391
- Population
- 4,951,258
- Avg. median income
- $123,700population-weighted
- Counties
- 7
Click anywhere on the map to see which ZIP code it's in.
Counties in the Boston-Cambridge-Newton, MA-NH area
- Norfolk County, MA (central)
- Plymouth County, MA (central)
- Suffolk County, MA (central)
- Essex County, MA (central)
- Middlesex County, MA (central)
- Rockingham County, NH (central)
- Strafford County, NH
ZIP codes in the Boston-Cambridge-Newton, MA-NH area
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Frequently asked questions
How many ZIP codes are in the Boston-Cambridge-Newton, MA-NH metro area?
391 ZIP codes, based on each ZIP code's main county.
Which counties make up the Boston-Cambridge-Newton, MA-NH area?
Norfolk County, MA, Plymouth County, MA, Suffolk County, MA, Essex County, MA, Middlesex County, MA, Rockingham County, NH and Strafford County, NH.
What is an MSA?
A metropolitan statistical area (MSA) is a core city of 50,000+ people plus the surrounding counties tied to it by commuting, as defined by the U.S. Office of Management and Budget. Micropolitan areas have a core of 10,000–50,000. Together they are called core-based statistical areas (CBSAs).