Kogin Connecticut suna ne da ya dace, wanda ke nufin kogin da ke ratsa arewa maso gabashin Amurka, yana farawa daga jihar New Hampshire kuma yana gudana zuwa kudu ta Vermont, Massachusetts, da Connecticut, kafin ya shiga cikin Sautin Long Island. Yana da kusan kilomita 407 (mil 253) tsayi kuma shine kogi mafi tsayi a New England. Sunan "Connecticut" ya samo asali ne daga kalmar Algonquian "Quinnehtukqut," wanda ke nufin "kogin mai tsayi mai tsayi."