John Reginald Beardall (February 7, 1887 – January 4, 1967) was a rear admiral in the United States Navy. He was Superintendent of the United States Naval Academy in Annapolis, Maryland from January 31, 1942 to August 16, 1945. He was a 1908 graduate of the Naval Academy and Aide to the Secretary of the Navy, from 1936 to 1939.