Lance Jonathan Sussman (born July 17, 1954) is an historian of American Jewish History, college professor, Chair of the Board of Governors of Gratz College, Melrose Park, PA and until summer 2022 the senior rabbi, now emeritus, at Reform Congregation Keneseth Israel (KI) located in Elkins Park, PA. He is the author of numerous books and articles including: Isaac Leeser and the Making of American Judaism (1995) and Sharing Sacred Moments (1999), and a co-editor of Reform Judaism in America: A Biographical Dictionary and Sourcebook (1993) and New Essays in American Jewish History (2009). Since 2010 he has also published articles on Judaism and art.