List of US Post Office Stores in Harwinton, CT Outlet Note Regular Brands US Post Office Connecticut Harwinton Rating 4.5 based on 76 votes Official Website https://www.usps.com/ Products Postal Service NameAddressPhone Name/Address/Phone US Post Office outlet - Harwinton 122 Litchfield Rd, #2 (860) 485-1935 People Also Viewed