Dummerston is a town in Windham County, Vermont, United States. The population was 1,865 at the 2020 census. It is home to the longest covered bridge still in use in Vermont. Its borders include three main villages: Dummerston Center, West Dummerston, and East Dummerston.

Windham County is a county located in the U.S. state of Vermont. As of the 2020 census, the population was 45,905. The shire town is Newfane, and the largest municipality is the town of Brattleboro.