John R. Dailey (born on February 17, 1934) is a retired United States Marine Corps four-star general. He served as Assistant Commandant of the Marine Corps (ACMC) and Chief of Staff from 1990 to 1992. He also served as Acting Associate Deputy Administrator of the National Aeronautics and Space Administration (NASA) from 1992 to 1999. Today, he is director of the National Air and Space Museum (NASM) since 2000.