Postal Service

Post Office Locations

There are three postal locations in Watertown with differing services at each:

  • 126 Main Street
    • Financial operation, customers can mail letters, parcels, bulk mail, rent a post office box, apply for passport (Monday - Friday, 10:00 am - 2:00 pm)
    • 18 year-old can sign up for the draft
    • Hours: Monday – Friday, 7:30 am - 5:00 pm, Saturday, 7:30 am - 1:30 pm
    • Ph: (617) 924-1215
  • 589 Mt. Auburn Street
    • Financial office only for mailing letters and packages, no boxes for rent
    • Hours: Monday – Friday, 9:00 am - 5:00 pm
    • Closed Saturdays
    • 617-924-7480

. 123 Galen Street

    Monday - Friday 9am - 5pm

    Phone 617-926-2606


The Watertown Post Office delivers to approximately 15,997 locations. There are 66 collection boxes in town, plus six express mail boxes located at 9 Galen Street (rear), the Watertown Mall, 65 Grove Street, and 602 Pleasant Street, and in front of the post offices at 126 Main Street and 589 Mt. Auburn Street.

Answers Fast!

Call (800) ASK-USPS.