Middlesex County ZIP Codes
Middlesex County is a county of Massachusetts.
- ZIP codes
- 111
- Cities & towns
- 78
- Area codes
- 8
- Land area
- 818 sq mi
Every ZIP code in Middlesex County
| ZIP code | City |
|---|---|
| 01431 | Ashby |
| 01432 | Ayer |
| 01450 | Groton |
| 01460 | Littleton |
| 01463 | Pepperell |
| 01464 | Shirley |
| 01469 | Townsend |
| 01470 | Groton |
| 01471 | Groton |
| 01472 | West Groton |
| 01474 | West Townsend |
| 01701 | Framingham |
| 01702 | Framingham |
| 01703 | Framingham |
| 01704 | Framingham |
| 01705 | Framingham |
| 01718 | Acton |
| 01719 | Boxborough |
| 01720 | Acton |
| 01721 | Ashland |
| 01730 | Bedford |
| 01731 | Hanscom Afb |
| 01741 | Carlisle |
| 01742 | Concord |
| 01746 | Holliston |
| 01748 | Hopkinton |
| 01749 | Hudson |
| 01752 | Marlborough |
| 01754 | Maynard |
| 01760 | Natick |
| 01770 | Sherborn |
| 01773 | Lincoln |
| 01775 | Stow |
| 01776 | Sudbury |
| 01778 | Wayland |
| 01784 | Woodville |
| 01801 | Woburn |
| 01803 | Burlington |
| 01805 | Burlington |
| 01813 | Woburn |
| 01815 | Woburn |
| 01821 | Billerica |
| 01822 | Billerica |
| 01824 | Chelmsford |
| 01825 | North Reading |
| 01826 | Dracut |
| 01827 | Dunstable |
| 01850 | Lowell |
| 01851 | Lowell |
| 01852 | Lowell |
| 01853 | Lowell |
| 01854 | Lowell |
| 01862 | North Billerica |
| 01863 | North Chelmsford |
| 01864 | North Reading |
| 01865 | Nutting Lake |
| 01866 | Pinehurst |
| 01867 | Reading |
| 01876 | Tewksbury |
| 01879 | Tyngsboro |
| 01880 | Wakefield |
| 01886 | Westford |
| 01887 | Wilmington |
| 01888 | Woburn |
| 01889 | North Reading |
| 01890 | Winchester |
| 02138 | Cambridge |
| 02139 | Cambridge |
| 02140 | Cambridge |
| 02141 | Cambridge |
| 02142 | Cambridge |
| 02143 | Somerville |
| 02144 | Somerville |
| 02145 | Somerville |
| 02148 | Malden |
| 02149 | Everett |
| 02153 | Medford |
| 02155 | Medford |
| 02156 | West Medford |
| 02176 | Melrose |
| 02180 | Stoneham |
| 02212 | Boston |
| 02238 | Cambridge |
| 02420 | Lexington |
| 02421 | Lexington |
| 02451 | Waltham |
| 02452 | Waltham |
| 02453 | Waltham |
| 02454 | Waltham |
| 02455 | North Waltham |
| 02456 | New Town |
| 02458 | Newton |
| 02459 | Newton Center |
| 02460 | Newtonville |
| 02461 | Newton Highlands |
| 02462 | Newton Lower Falls |
| 02464 | Newton Upper Falls |
| 02465 | West Newton |
| 02466 | Auburndale |
| 02467 | Chestnut Hill |
| 02468 | Waban |
| 02471 | Watertown |
| 02472 | Watertown |
| 02474 | Arlington |
| 02475 | Arlington Heights |
| 02476 | Arlington |
| 02477 | Watertown |
| 02478 | Belmont |
| 02479 | Waverley |
| 02493 | Weston |
| 02495 | Nonantum |
We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP. USPS delivery-type products are licensed, and no clean-rights source maps ZIP codes to neighbourhoods — so the Middlesex County codes above are listed without a column we would have to invent.
Cities and towns in Middlesex County
A further 53 places in Middlesex County appear in the postal source without a page of its own; their codes are in the table above and each one links to its own page.
Area codes covering Middlesex County
Telephone and postal boundaries are drawn by different bodies, so these codes overlap the county without matching its edges.
- 339 Area code 339
- 351 Area code 351
- 508 Area code 508
- 617 Area code 617
- 774 Area code 774
- 781 Area code 781
- 857 Area code 857
- 978 Area code 978
Where Middlesex County's ZIP codes sit
- Reference points and footprint
- Not an official NANPA boundary
- Not a USPS delivery area
Scope every ZIP code recorded in Middlesex County. Source GeoNames US postal codes (2026-07 postal dump), Census 2024 county Gazetteer (2024 Gazetteer) and geoinfo-dataset (full_dataset) ZIP→NPA (2018 snapshot). Updated . The outline is a convex envelope of ZIP reference points, not a jurisdiction boundary.