The swimming competitions at the 2017 Commonwealth Youth Games in Nassau, The Bahamas took place from 19 to 22 July at the Betty Kelly Kenning Swim Complex.

[1][2] A total of 184 athletes from 45 nations contested 35 different events.

In the Games, age limits set by the Fédération Internationale de Natation (FINA) for world Junior competitions were followed, according to which the age limit for boys is set to 15–18 years (means swimmers born in 1999, 2000, 2001 and 2002) and for girls its 14–17 years of age (means swimmers born in 2000, 2001, 2002 and 2003).

[3] The competition will feature 35 long course (50m) events, divided between males, females and mixed events into the following events: There were 45 participating nations at the swimming competitions with a total of 184 swimmers.

The number of athletes a nation entered is in parentheses beside the name of the country.