Luther Scott Harshbarger (born December 1, 1941) is an American attorney and Democratic politician. He served as the 56th Massachusetts Attorney General from 1991 to 1999. In 1998, he was the Democratic nominee for Governor of Massachusetts but lost a close race to acting Governor Paul Cellucci. As of 2016, he served as senior counsel in the Boston law firm of Casner & Edwards, LLP.