1. Postal Center USA 440 Middlesex Rd, Tyngsboro, MA 01879 Coordinate: 42.69618,-71.44094 Phone: (978) 649-6266
2. United States Postal Service 353 Middlesex Rd, Tyngsboro, MA 01879 Coordinate: 42.68912,-71.43234 Phone: (800) 275-8777