Hatfield is a town in Hampshire County, Massachusetts, United States. The population was 3,249 at the 2000 census. It is part of the Springfield, Massachusetts Metropolitan Statistical Area.
Part of the town is included in the census-designated place of Hatfield.
Hatfield was founded in 1660 on land granted to General Daniel Dennison and Governor William Bradford. It was formally incorporated as a town in 1670 and has a Board of Selectmen and annual town meeting.