Brunswick is a town in Essex County, Vermont, United States. The town was named after Prince Karl Wilhelm Ferdinand of Brunswick-Lunenburg. The population was 88 at the 2020 census. It is part of the Berlin, NH-VT Micropolitan Statistical Area. Brunswick is home to six mineral springs that made the town a popular resort destination in the 19th century. The land the springs are on is now owned by the Abenaki people.