Joseph Morgan Kousser (born October 7, 1943) is a professor of history and social sciences at the California Institute of Technology. Kousser is author of The Shaping of Southern Politics: Suffrage Restriction and the Establishment of the One-Party South, 1880-1910 and Colorblind Injustice: Minority Voting Rights and the Undoing of the Second Reconstruction. Kousser is also current editor of the journal Historical Methods.
One of Kousser's primary fields of expertise is the current and historical interaction of race and voting rights in the United States. He has served as an expert witness in over twenty federal or state voting rights cases, including Garza v. County of Los Angeles (1990), United States v. Memphis (1991), Shaw v. Hunt (1994), and Cano v. Davis (2002).
He is a graduate of Princeton University (A.B., 1965) and Yale University (Ph. D., 1971) and holds an honorary degree from Oxford University (M.A., 1984). In the past, he held visiting professorships at Harvard University and Oxford University.