Colchester is located in New London County southeast of Hartford between East Hampton and Norwich along Highway 2 near Amston Lake. Day Pond State Park is located just west.
The community was named after the town in England. Nathaniel Foote's grandfather had emigrated from Colchester, England, early in the 17th century and Colchester in America was the vision of a group of early English settlers who sought to lay out a new plantation in a large tract of virgin wilderness.
The town of Colchester, Connecticut was founded in 1698 at a point just north of the present Town Green at Jeremiah's Farm on land purchased by Nathaniel Foote from the Sachem of the Mohegan Indians.
Local attractions include: Bartlett Brook Wildlife Area, Golden Hill Paugusset Reservation, James Street Pond, Hayward Lake, Savin Lake, Red Cedar Lake, Deep River Reservoir, Amston Lake, and Day Pond State Park.
Colchester is part of the New London-Norwich metro area.