Dorset is a town in Bennington County, Vermont, United States. The population was 2,133 at the 2020 census. Dorset is famous for being the location of Cephas Kent's Inn, where four meetings of the Convention that signed the Dorset Accords led to the independent Vermont Republic and future statehood. Dorset is the site of America's oldest marble quarry and is the birthplace of Bill W., co-founder of Alcoholics Anonymous. East Dorset is the site of the Wilson House and the Griffith Library.