Ian Lowell Crocker is an American former competition swimmer, five-time Olympic medalist, and former world record-holder. During his career, he set world records in the 50- and 100-meter butterfly and the 100-meter freestyle. He has won a total of twenty-one medals in major international competition, spanning the Olympics, the FINA World Aquatics Championships, and the Pan Pacific Swimming Championships. He coached for many years at the Western Hills Athletic Club and has helped coach the Longhorns swim camp in 2019 as well as other years. Since Spring of 2022 when the new facility opened, Crocker coaches at the Western Aquatics and Social Club at the Eanes Independent School District Aquatics center.

The 2005 World Aquatics Championships or the XI FINA World Championships were held in Montreal, Quebec, Canada from July 16 to July 31, 2005. They took place in Parc Jean-Drapeau on Saint Helen's Island.