Wales is a town in Hampden County, Massachusetts, United States. The population was 1,838 at the 2010 census. It is part of the Springfield, Massachusetts Metropolitan Statistical Area. Wales was officially incorporated in 1762 as South Brimfield, a name it kept until February 20, 1828. The town was named after James Lawrence Wales, a local benefactor.
According to the United States Census Bureau, the town has a total area of 16.0 square miles (41.3 km²), of which, 15.8 square miles (40.8 km²) of it is land and 0.2 square miles (0.5 km²) of it (1.32%) is water. Wales is bounded on the west by Monson; on the south by Stafford, Connecticut and Union, Connecticut; on the east by Holland; and on the north by Brimfield.