ZIP code · Cambridge · Massachusetts · United States
ZIP code 02138 — Cambridge
ZIP code 02138 serves Cambridge, Massachusetts.
- Postal code
- 02138Single source Value from one source, not cross-checked.
- City
- Cambridge
- County
- Middlesex FIPS 25017
- State
- Massachusetts
- Country
- United States
- Coordinates
- 42.3770, -71.1256 — precision precise (locality)
View on OpenStreetMap - Population
- 38,077 (ZCTA, ACS 5-year)
- Population density
- 13,910 / sq mi
- Land area
- 2.7 sq mi (7.1 km²) (ZCTA, ACS 5-year)
- Median household income
- $122,040
- Per-capita income
- $74,990
- Median age
- 28.7
- Households
- 14,239
- Housing units
- 16,132
- Median home value
- $1,088,700
- Median gross rent
- $2,799 / month
- Congressional districts
- MA-5 (also MA-7) (119th Congress)
- USDA hardiness zone
- 6b (-5 to 0 °F)Planting / growing zone from the 2023 USDA Plant Hardiness Zone Map: average annual extreme minimum temperature, 1991–2020.
- Time zone
- America/New_York (UTC−5 / UTC−4 DST)
Tools: compare 02138 with another ZIP · ZIPs within 25 miles · distance from 02138
Map of ZIP code 02138
Climate — monthly normals
Warmest month Jul (avg high 85°F), coldest Jan (avg low 19°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 37 | 40 | 47 | 59 | 69 | 79 | 85 | 83 | 76 | 64 | 53 | 42 |
| Avg low °F | 19 | 21 | 28 | 38 | 48 | 58 | 64 | 63 | 55 | 43 | 34 | 26 |
| Precip in | 3.9 | 3.6 | 4.5 | 4.3 | 3.6 | 4.2 | 3.5 | 3.7 | 4.0 | 5.0 | 4.0 | 5.1 |
NOAA 1991–2020 climate normals from the nearest station: JAMAICA PLAIN (5.1 mi) · NOAA NCEI
Places in ZIP 02138
- 19 schools
- 14 colleges & universities
- 3 hospitals & clinics
- 7 doctors & dentists
- 4 pharmacies
- 7 supermarkets
- 118 restaurants & cafés
- 10 bars & pubs
- 35 parks
- 29 playgrounds
- 11 gyms & sports centres
- 29 libraries
- 15 post offices
- 23 places of worship
- 14 banks
- 6 gas stations
- 2 EV charging stations
- 5 police & fire stations
Places mapped inside this ZIP’s ZCTA area in OpenStreetMap. OSM is community-maintained: counts reflect what has been mapped, and completeness varies by area — treat them as at-least figures. © OpenStreetMap contributors (ODbL) · Methodology
About this page
US ZIP codes have five digits. They are postal routing areas, not administrative boundaries: a ZIP can span more than one city or county, and the city shown is the primary USPS name for that code.
GeoNames · U.S. Census Bureau (ACS) · U.S. Census Bureau · NOAA NCEI · usda-phzm. Data generated on 2026-08-21. Methodology · Report an error on this page