The league consisted of seven short course swimming meets which took place in seven cities around the world.

[2] The France-based team Energy Standard won the inaugural ISL title in the Final Match hosted at Mandalay Bay Resort and Casino in Las Vegas.

The schedule consists of six regular-season meets, followed by a Final Match in Las Vegas.

A total of 37 races were held in each match (the 4x50m mixed medley relay acted as a tie breaker).

[17] ISL teams can have a maximum roster of 32 athletes for 2019 season, with a suggested size of each club's traveling roster of 28 (14 men and 14 women).