Kelsey Christine Plum (born August 24, 1994) is an American professional basketball player for the Las Vegas Aces of the Women's National Basketball Association (WNBA). She won a gold medal in Women's 3x3 basketball, at the 2020 Summer Olympics.

She completed her high school education at La Jolla Country Day School in La Jolla, a community that is part of San Diego, California. Plum attended and played college basketball for the University of Washington. On February 25, 2017, Plum scored a career-high 57 points on senior night – making 19 of the 28 shots she took – to break the NCAA Division I women's basketball all-time scoring record with 3,397 points. On March 20, 2017, Plum broke the NCAA record for points in a single season with 1,080. She was selected with the first overall pick in the 2017 WNBA Draft by the San Antonio Stars.