Groton is a town in Caledonia County, Vermont, United States. The population was 1,022 at the 2010 census. It contains the places Groton Pond, Rickers Mills, Rickers and West Groton. The unincorporated village of Groton in the southeast corner of town is recorded as the Groton census-designated place (CDP), with a population of 437 at the 2010 census.HistorySome say the town was named after Groton, Massachusetts, while others believe it was named after Groton, Connecticut.GeographyGroton is located in the southwest corner of Caledonia County. It is bordered by the town of Peacham to the north, Barnet to the northeast, and Ryegate to the east, all in Caledonia County. To the south, in Orange County, are the towns of Newbury (southeast), Topsham (south), and Orange (southwest). The Washington County towns of Plainfield and Marshfield are to the west. According to the United States Census Bureau, the town has a total area of, of which is land and 3.1sqkm, or 2.19%, is water.