Kendall Square Post Office

91 1st St, Cambridge, MA 02141

Contact Numbers

Phone: 617-876-5155
TTY: 877-889-2457
Toll-Free: 1-800-Ask-USPS® (275-8777)

Retail Hours







Lobby Hours
PO Box Access Available

Monday 7:30am - 5:00pm
Tuesday 7:30am - 5:00pm
Wednesday 7:30am - 5:00pm
Thursday 7:30am - 5:00pm
Friday 7:30am - 5:00pm
Saturday Closed
Sunday Closed

Last Collection Times

Monday 5:00pm
Tuesday 5:00pm
Wednesday 5:00pm
Thursday 5:00pm
Friday 5:00pm
Saturday Closed
Sunday Closed

*This facility does not process US Passports applications or renewals. Check nearby locations below.

  • Money Orders (Domestic)
  • Money Orders (Inquiry)
  • Money Orders (International)
  • PO Box Online

Visit our Links Page for Holiday Schedule, Change of Address, Hold Mail/Stop Delivery, PO Box rentals and fees, and Available Jobs.

*Please call to verify information. Is anything incorrect? Let us know here

Nearby Post Offices:

East Cambridge
303 Cambridge St
0.2 mile away

Charles Street
136 Charles St
0.4 mile away

Porter Square Carrier Annex
30 Cobble Hill Rd
0.5 mile away

Charlestown
3 Austin St
0.6 mile away

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