The Harold Leinbach Oral History, dated 1999-2002, contains audio recordings, administrative information, and transcripts of the interview between Leinbach and Brian Shoemaker of the American Polar Society conducted on October 3, 2000. This interview was a part of a series of polar oral histories sponsored by the American Polar Society and Ohio State University's Byrd Polar Research Center Archival Program, with funding from the National Science Foundation. Major topics discussed include Leinbach's work designing the first riometer in the world to measure radio waves in space, his time operating riometers in the Arctic regions during the International Geophysical Year (1957-1958), and his experiences studying the aurora in the Arctic.