Franklin J. Knoll (born April 30, 1940) is an American lawyer, judge, and politician.
He served in the United States Navy and was commissioned a lieutenant.
Knoll graduated from College of Saint Benedict and Saint John's University with a bachelor's degree in biology and chemistry in 1962.
Knoll lived in Minneapolis, Minnesota with his wife and family.
He practiced law in Minneapolis and served as a Hennepin County Public Defender.