Harvey Claflin Mansfield Jr. (born March 21, 1932) is an American political philosopher. He is the William R. Kenan, Jr. Professor of Government at Harvard University, where he has taught since 1962. He has held Guggenheim and NEH Fellowships and has been a Fellow at the National Humanities Center; he also received the National Humanities Medal in 2004 and delivered the Jefferson Lecture in 2007. He is a Carol G. Simon Senior Fellow at Stanford University's Hoover Institution. He is notable for his generally conservative stance on political issues in his writings.