Waltham, MA ZIP Codes
Waltham, Massachusetts has 4 ZIP codes: 3 for street addresses (, and ) and 1 for PO boxes ().
Your street decides which one you use.
Which Waltham 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?
Waltham ZIP code map
Tap or point to an area to see its ZIP code.Full-size map
02454 has no area on the map: it is a PO box or single-organization ZIP code. Dashed line: Waltham city limits.
Map: Census Bureau ZIP Code Tabulation Areas (2020) and place limits (2024).
All Waltham ZIP codes by type
| ZIP | Type and post office or station |
|---|---|
| 02451 | street delivery Waltham Carrier Annex |
| 02452 | street delivery Waltham Carrier Annex |
| 02453 | street delivery Waltham Carrier Annex |
| 02454 | PO boxes at the Waltham post office Waltham |
Waltham ZIP code questions
What is the main ZIP code for Waltham?
02451, the ZIP code of the main Waltham Carrier Annex post office at 200 Smith St Suite 101.
Which Waltham ZIP codes are for PO boxes only?
02454. Mail to it goes to boxes at the post office, not to street addresses.
What county is Waltham in?
Middlesex County.
ZIP codes for towns near Waltham
More towns near Waltham: Brookline, Somerville, Medford, Needham, Woburn, Natick, Everett, Malden, Chelsea.
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