International Swimming League
| Sport | Swimming |
|---|---|
| Founded | 2019 |
| CEO | Konstantin Koudriaev |
| President | Konstantin Grigorishin |
| No. of teams | 10 |
| Countries | Worldwide |
| Official website | https://isl.global/ |
The International Swimming League (ISL) was an annual professional swimming league, established in 2019. It features a team-based competition format with fast-paced race sessions. In 2019, the regular season started in October and the Final Match was held in December. Coverage in 2019 reported that the ISL operated with a US$20 million budget for its inaugural season, including US$7 million allocated for athlete and team prize money. Financed by Konstantin Grigorishin, the league expressed an aim of “putting power back into the hands of the athletes.” It also enforced a strict anti-doping policy under which athletes with prior doping suspensions were banned from competition.
After suspending operations following the 2021 season, the league announced plans in December 2025 to target a relaunch as early as 2026 under a revised commercial model.