. "40.0"^^ . . "3.68e+07"^^ . . "1.55399e+06"^^ . "Deep River (formerly known as Saybrook) is a town in Middlesex County, Connecticut, United States. The population was 4,629 at the 2010 census. The town center is also designated by the U.S. Census Bureau as a census-designated place (CDP)."@en . "4629"^^ . "3.51e+07"^^ . "3.67778e+07"^^ . "Selectman"@en . "First selectman"@en . "Deep River, Connecticut"@en . . . "06417, 06419" . "-5" . "39.9288"^^ . . "-4" . . "1.6e+06"^^ . "860" . . "3.52238e+07"^^ . . .