László Cseh is a retired Hungarian competitive swimmer and six-time Olympic medalist. He is a 33-time European Champion. His father, László Cseh Sr., also represented Hungary at the Olympics in swimming. In 2020 Braden Keith of SwimSwam nominated him as number 1 within top 10 male swimmers who have never won Olympic gold.

The Swimming competition at the 11th FINA World Aquatics Championships consisted of 40 long course events, swum July 24–31, 2005 at pools in Parc Jean-Drapeau in Montreal, Quebec, Canada. Swimming's 40 events were split evenly between males and females and were:freestyle (free): 50, 100, 200, 400, 800 and 1500; backstroke (back): 50, 100 and 200; breaststroke (breast): 50, 100 and 200; butterfly (fly): 50, 100 and 200; Individual Medley (IM): 200 and 400; and relay: 4×100 and 4×200 freestyle, and 4×100 medley.