La Sierra University (La Sierra or LSU) is a Seventh-day Adventist non-profit co-educational university located in Riverside, California, United States. La Sierra offers undergraduate, graduate and doctoral level degrees and is accredited by the Western Association of Schools and Colleges (WASC) and the Adventist Accrediting Association (AAA).

Founded in 1922 as La Sierra Academy, it later became La Sierra College, a liberal arts college, and then was merged into Loma Linda University in 1967. In 1990, La Sierra separated from Loma Linda University to become an independent institution. Since becoming independent in 1990, LSU has won multiple national and world titles in the Enactus