|Full name||Klete D. Keller|
|National team||United States|
|Born||March 21, 1982|
Las Vegas, Nevada
|Height||6 ft 6 in (1.98 m)|
|Weight||214 lb (97 kg)|
|Club||Trojans Swim Club|
|College team||University of Southern California|
Klete D. Keller (born March 21, 1982) is an American former competition swimmer who won medals at the 2000 Summer Olympics and the 2004 Summer Olympics in the 400-meter freestyle and the 4×200-meter freestyle relay. In the 4×200-meter freestyle relay, Keller held off a charging Ian Thorpe in the anchor leg to win the race by 0.13 seconds. This was the first time Australia had been beaten in the event in over seven years. The American relay of Michael Phelps, Ryan Lochte, Peter Vanderkaay, and Keller are undefeated since the Athens games. Vanderkaay, Larsen Jensen, Erik Vendt, and Keller make up the core of the premier American mid-distance/distance freestyle swimmers.
Keller attended the University of Southern California for two years from 2000 to 2001, but left school to focus on swimming. While at USC, Keller won multiple individual and relay Pac-10 and NCAA Championships in the 200, 500 and 1,650-yard freestyle, as well as freestyle relays.
Keller has also won many U.S. national titles and FINA world championship medals, primarily in 200 and 400-meter freestyles and the 4×200-meter free relay.
From 2004 to 2007, Keller trained at the University of Michigan in Ann Arbor under Bob Bowman and former head coach Jon Urbanchek. He has left Ann Arbor and returned to USC to finish school and train under coach Dave Salo.
- List of Olympic medalists in swimming (men)
- List of University of Southern California people
- List of World Aquatics Championships medalists in swimming (men)
- World record progression 4 × 200 metres freestyle relay