Swimming competitions at the 2015 Pan American Games in Toronto were held from July 14 to 18 at the Toronto Pan Am Sports Centre (CIBC Pan Am/Parapan Am Aquatics Centre and Field House). Due to naming rights the arena was known as the latter for the duration of the games. Due to Pan American Games being scheduled to be held roughly around the same time as the 2015 World Aquatics Championships scheduled for Kazan, Russia, the swimming events were condensed into a five-day schedule.
The competition will feature 32 long course (50 m) events, divided evenly between males and females into the following 16 events:
There will also be two open water swim events (one each for men and women) over 10 km.
The following is the competition schedule for the swimming competitions:
<nowiki>*</nowiki> Swimmers who participated in the heats only and received medals.
<nowiki>*</nowiki> Swimmers who swam in preliminary heats and received medals.
A total of 37 countries qualified 312 swimmers. The number of athletes a nation entered is in parentheses beside the name of the country.
As with previous editions of the Games, A/B qualifying times will be used, with a target number of 276 swimmers. Times need to be swum in an approved meet sometime between January 1, 2014 and April 15, 2015. A total of 36 open water swimmers will also qualify (18 per gender).