Marion Milton Magruder (June 27, 1911 – June 27, 1997) was an officer in the United States Marine Corps, and a pioneer in Radar Intercept Night Fighting. He was the first commanding officer of Marine aircraft squadron VMF(N)-533, then known as "Black Mac's Killers" [1], and led that squadron during the Battle of the Marshall Islands and Battle of Okinawa in World War II.