Allan M. Campbell (April 27, 1929 – April 19, 2018) was an American microbiologist and geneticist whose pioneering work on Lambda phage has helped advance molecular biology in the late 20th century. Campbell has been a professor of in the Department of Biology at Stanford University since 1968, and he was appointed to the Barbara Kimball Browning endowed chair in 1992.Campbell earned his bachelor's degree at the University of California-Berkeley and master's and doctoral degrees from the University of Illinois. He is a member of the National Academy of Sciences and a fellow of the American Academy of Microbiology, the American Association for the Advancement of Science and the American Academy of Arts and Sciences.