Brunswick is a town in Cumberland County, Maine, United States. The population was 20,278 at the 2010 census. It is part of the Portland-South Portland-Biddeford metropolitan area. Brunswick is home to Bowdoin College, the Bowdoin College Museum of Art, the Peary-MacMillan Arctic Museum, The Theater Project, and the Maine State Music Theatre. It was home to Naval Air Station Brunswick which permanently closed on May 31, 2011.