Old Saybrook Center is the primary village and a census-designated place (CDP) in the town of Old Saybrook, Middlesex County, Connecticut, United States. The population was 2,278 at the 2020 census, out of 10,481 in the entire town of Old Saybrook. The CDP includes the traditional town center and the peninsula known as Saybrook Point.

Old Saybrook is a town in Middlesex County, Connecticut, United States. The town is part of the Lower Connecticut River Valley Planning Region. The population was 10,481 at the 2020 census. It contains the incorporated borough of Fenwick, and the census-designated places of Old Saybrook Center and Saybrook Manor.