Karissa Schweizer (born May 4, 1996) is an American middle- and long-distance runner.
Representing the University of Missouri, she won the 2016 NCAA Division I Cross Country Championships and holds five other NCAA individual championship titles in track and field.
Schweizer is the current American collegiate record-holder for the indoor 3000 m with a time of 8:41.60, set at the 2018 Millrose Games.
She has been labeled the most decorated female athlete in University of Missouri history.