Post office locations in 02139
| Post Office | Address | Phone | Hours |
| CAMBRIDGE | 770 MASSACHUSETTS AVE CAMBRIDGE, MA 02139 - 9998 | 617-575-8700 | Mon-Fri 7:30am - 7:00pm Sat 7:30am - 2:00pm Sun Closed |
| INMAN SQUARE | 1311 CAMBRIDGE ST CAMBRIDGE, MA 02139 - 9991 | 617-864-4344 | Mon-Fri 10:00am - 5:00pm Sat-Sun Closed |
| M I T | 84 MASSACHUSETTS AVE CAMBRIDGE, MA 02139 - 9992 | 617-494-5511 | Mon-Fri 10:00am - 4:00pm Sat-Sun Closed |