Glastenbury is a town in Bennington County, Vermont, United States. The town was unincorporated by an act of the state legislature in 1937. The population was 9 at the 2020 census.[1] Along with Somerset, Glastenbury is one of two Vermont towns where the population levels have dropped so low that the town has been unincorporated. The town has no local government and the town's affairs are handled by a state-appointed supervisor.