Austin Rhone Clapp (November 8, 1910 – December 22, 1971) was an American competition swimmer and water polo player who represented the United States at the 1928 Summer Olympics and 1932 Summer Olympics. Clapp grew up on the small island of Nauru, one of three sons of parents who served as medical personnel for the British phosphate mining operations on the island. At the 1932 Olympics in Los Angeles, California, he was a member of the third-place U.S. water polo team that received the bronze medal. In 1976, he was inducted into the USA Water Polo Hall of Fame.