South Hadley is a town in Hampshire County, Massachusetts, United States. The population was 17,514 at the 2010 census, and was estimated to be 17,791 in 2017. It is part of the Springfield, Massachusetts Metropolitan Statistical Area.
South Hadley is home to Mount Holyoke College, South Hadley High School, Pioneer Valley Performing Arts Charter Public School, and the Berkshire Hills Music Academy.