Groton is a town in Caledonia County, Vermont, United States. The population was 984 at the 2020 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 419 at the 2020 census.

Caledonia County is a county located in the northeastern part of the U.S. state of Vermont. As of the 2020 census, the population was 30,233. Its shire town is the town of St. Johnsbury. The county was created in 1792 and organized in 1796. It was given the Latin name for Scotland, in honor of the many settlers who claimed ancestry there.