Swimming at the 2015 World Aquatics Championships was held between 2 and 9 August 2015 in Kazan, Russia.

[1] The United States won the overall medal count, led by Katie Ledecky who claimed five gold medals.

*   Host nation (Russia) AF African record | AM Americas record | AS Asian record | CR Championship record | ER European record | OC Oceania record | WR World record | NR National record a Swimmers who participated in the heats only and received medals.

AF African record | AM Americas record | AS Asian record | CR Championship record | ER European record | OC Oceania record | WR World record | NR National record b Swimmers who participated in the heats only and received medals.

The following world and championship records were broken during the competition.