Owen Witte is an American physician-scientist at the University of California, Los Angeles. He is a University Professor of microbiology, immunology and molecular genetics in the David Geffen School of Medicine at UCLA, founding director emeritus of the UCLA Eli and Edythe Broad Center of Regenerative Medicine and Stem Cell Research, and the UC Regents’ David Saxon Presidential Chair in developmental immunology (1989–present). Witte is also a Howard Hughes Medical Institute investigator (1986–2016) and a member of the President's Cancer Panel, the National Academy of Sciences, the National Academy of Medicine, the American Academy of Arts and Sciences, and the Cancer Research Academy of the AACR. He serves on numerous editorial boards and scientific advisory boards for academic centers and biotechnology companies.