Magnolia - Gloucester Post Office 6 Lexington St.Gloucester, MA 01930978-525-3488Manchester Post Office 15 Beach St.Manchester, MA 01944978-526-4357United States Postal Service Masachusetts Post Offices1-800-275-8777US Postal Service - Post Offices 800-275-8777Locate the local Post office in the area, print shipping labels and postage all online.Zip Codes.org United States Zip Code Search