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.

At the 1928 Olympics in Amsterdam, Netherlands, Clapp won a gold medal as a member of the winning U.S. team in the men's 4×200-meter freestyle relay, together with Walter Laufer, George Kojac and Johnny Weissmuller.

[1] He attended Stanford University, where he was a member of the Stanford Cardinal swimming and water polo teams in National Collegiate Athletic Association (NCAA) competition.

[3] After completing his undergraduate degree at Stanford in Political Science, he graduated from the University of California, Berkeley's law school.

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.