The City of Groton is a dependent political subdivision of the town of Groton in New London County, Connecticut. The city was settled in 1655 as Groton Bank, and the area developed into the principal village of the town of Groton. The village of Groton incorporated as a borough in 1903, and the residents of the borough of Groton reincorporated as the city of Groton in 1964. It is the only remaining city in the state of Connecticut that is not governmentally consolidated with its parent town. The population was 10,389 at the 2010 census.