List of US Post Office Stores in Mystic, CT Outlet Note Regular Brands US Post Office Connecticut Mystic Rating 4.5 based on 76 votes Official Website https://www.usps.com/ Products Postal Service NameAddressPhone Name/Address/Phone US Post Office outlet - Mystic 55 West Mystic Ave (860) 536-0530 US Post Office outlet - Mystic 23 E Main St (860) 536-8143 US Post Office outlet - Mystic 47 Main St, #1 (860) 536-0510 People Also Viewed