List of US Post Office Stores in Newton, MA Outlet Note Regular Brands US Post Office Massachusetts Newton Rating 4.5 based on 76 votes Official Website https://www.usps.com/ Products Postal Service NameAddressPhone Name/Address/Phone US Post Office outlet - Newton 2344 Washington St, Ste 1 (800) 275-8777 US Post Office outlet - Newton 326 Watertown St (617) 244-2379 US Post Office outlet - Newton 716 Beacon St (617) 558-1399 People Also Viewed