The 2020 International Swimming League was the second edition of the International Swimming League, a professional swimming league, established in 2019. It comprised ten teams composed of both women and men. The league, due to COVID-19 pandemic travel restrictions, consisted of thirteen short course swimming meets which took place in the city of Budapest, Hungary.

The International Swimming League (ISL) is 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.