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City ZIP codes · Massachusetts

Cambridge, MA ZIP Codes

6 ZIP codes use the postal name Cambridge, Massachusetts (Census 2020 ZCTAs and GeoNames postal codes, October 2026): 5 residential and 1 for PO boxes or a single organization. Median household income runs from $119,967 in 02138 to $147,723 in 02142, 1.2 times as much (Census Bureau, ACS 2020-2024). Cambridge's most populous ZIP code is 02139, with 40,033 people (ACS 2020-2024); 100% of its land is in the city of Cambridge.

  • ACS2020-24
  • Census2020
  • GeoNames2026

Where are Cambridge's ZIP codes?

02138: $120k median household income02139: $135k median household income02140: $135k median household income02141: $127k median household income02142: $148k median household income021380214002139021410214202138: $120k median household income02139: $135k median household income02140: $135k median household income02141: $127k median household income02142: $148k median household income021380214002139021410214202138: $120k median household income02139: $135k median household income02140: $135k median household income02141: $127k median household income02142: $148k median household income0213802140021390214102142
The 5 residential ZIP codes named Cambridge, shaded by median household income in national fifths (ACS 2020-2024). Select a ZIP to open it. <$54.1k$98.1k+no figure

Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).

How different are Cambridge's ZIP codes?

The highest median household income is in 02142 ($147,723), the lowest in 02138 ($119,967). Home values run from $868,100 in 02141 to $1,954,500 in 02142.

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013, B25077, B01003).

All 5 residential ZIP codes of Cambridge

Residential ZIP codes with the postal name Cambridge, MA, largest first (ACS 2020-2024); sort by any column
County
02139 Middlesex County 40,033 25,794 $135k $1.09M
02138 Middlesex County 38,509 14,065 $120k $1.21M
02140 Middlesex County 21,204 18,311 $135k $1.15M
02141 Middlesex County 14,517 23,837 $127k $868k
02142 Middlesex County 4,737 15,086 $148k $1.95M

Download the 6 ZIP codes as CSV

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; 2023 Gazetteer land areas (2020 ZCTAs); town names from simplemaps US ZIP Codes (CC BY 4.0) and GeoNames (CC BY 4.0).

PO Box and single-organization ZIP codes in Cambridge

1 ZIP code named Cambridge has no residential delivery area: post office boxes, or one organization (a large employer, an agency, a university) with its own code. The Census Bureau publishes no figures for them.

Cambridge, MA: ZIP codes without a residential area, for PO boxes or one organization (GeoNames postal codes; USPS does not publish openly which is which)
ZIPCounty
02238Middlesex County

Source: GeoNames postal codes (CC BY 4.0); a ZIP code with no Census ZCTA has no residential delivery area.

Which counties do Cambridge's ZIP codes reach?

Cambridge's residential ZIP codes lie in Middlesex County.

Which first three digits do Cambridge's ZIP codes use?

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Cambridge's ZIP codes use 2 prefixes: 021 and 022.

Three-digit prefixes of Cambridge's ZIP codes, the sectional center for each (USPS labeling list L005, effective October 1, 2026) and how many of the prefix's codes are Cambridge's
PrefixSectional centerHereAll codes
021 Boston, MA (SCF 021) 5 62
022 Boston, MA (SCF 021) 1 20

Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.