Most gold medals won at the FINA Swimming World Championships (male)

The most gold medals won at the FINA Swimming World Championships by a male swimmer is 26, by Michael Phelps from 2001 to 2011. He won one in 2001 (aged 16 years old), four in 2003, five in 2005, seven in 2007, five in 2009 and four in 2011. His seven-gold haul at the 2007 World Championships (including five world-record times) is a record for a single championships, equalled by Caeleb Dressel in 2017.

Phelps won the 200 m butterfly five times, a record for a single event at the Swimming World Championships.