Sunderland is a town in Franklin County, Massachusetts, United States, part of the Pioneer Valley. The population was 3,684 at the 2010 census. It is part of the Springfield, Massachusetts Metropolitan Statistical Area.
Sunderland was first settled in 1713 and was officially incorporated in 1718. It was first known as Swampfield, a name which is now honored by Swampfield Road, but the name was changed to attract more residents. It was renamed in honor of Charles Spencer, the Earl of Sunderland. Historically, the land was largely used for farming. Before the incorporation of Leverett in 1774, that town was a part of Sunderland's territory.