Dunkin Donuts Address: 122 Litchfield Rd, Harwinton, CT 06791 Phone: (860) 485-1429 Doughnuts, Coffee Shops, Bagels, Dunkin' Donuts Other Businesses: Patrick J Wall Law Offices LLC at 3 Whetstone Rd, Harwinton, CT 06791 Scott Ralph Ragaglia at 154 Woodchuck Ln, Harwinton, CT 06791 Salon East LLC at 122 Litchfield Rd, Harwinton, CT 06791