Adolph Gustav Kiefer (27 June 1918 – 5 May 2017) was an American former competition swimmer. He was the oldest living American Olympic champion and last Olympic champion of Berlin. He was also a former world record-holder. Kiefer was also an inventor and innovator of new products related to aquatics competition. He was the first man in the world to swim 100-yard backstroke in under one minute.
In the 1960s, he worked with Mayor Richard J. Daley to build swimming-pools across the inner city of Chicago, providing the facilities needed for thousands of children to learn to swim.
- International Swimming Hall of Fame, Honorees, Adolph Kiefer. Retrieved April 12, 2015.