Cambridge, MA ZIP Codes
Cambridge, Massachusetts has 6 ZIP codes: 5 for street addresses (, , , and ) and 1 for PO boxes ().
Your street decides which one you use.
Which Cambridge ZIP code is my address in?
Street ranges from the Census Bureau, 2026. PO box and organization ZIP codes are not found by street. A new street may be missing: address not found?
Cambridge ZIP code map
Tap or point to an area to see its ZIP code.Full-size map
02238 has no area on the map: it is a PO box or single-organization ZIP code. Dashed line: Cambridge city limits.
Map: Census Bureau ZIP Code Tabulation Areas (2020) and place limits (2024).
All Cambridge ZIP codes by type
| ZIP | Type and post office or station |
|---|---|
| 02138 | street delivery Porter Square Carrier Annex |
| 02139 | street delivery Cambridge |
| 02140 | street delivery Porter Square |
| 02141 | street delivery Cambridge |
| 02142 | street delivery Cambridge |
| 02238 | PO boxes at the Harvard Square post office Harvard Square |
Cambridge ZIP code questions
What is the main ZIP code for Cambridge?
02139, the ZIP code of the main Cambridge post office at 770 Massachusetts Ave.
Which Cambridge ZIP codes are for PO boxes only?
02238. Mail to it goes to boxes at the post office, not to street addresses.
What county is Cambridge in?
Middlesex County.
ZIP codes for towns near Cambridge
More towns near Cambridge: Chelsea, Malden, Newton, Boston, Waltham, Revere, Lexington, Woburn, Needham.
Sources and last checked
USPS ZIP Locale Detail (October 1, 2026), GeoNames (CC BY 4.0), U.S. Census Bureau, HUD-USPS crosswalk.
Checked October 20, 2026. Sources · How we build our lists · Corrections