Major achievements in swimming by nation

This is a list of the best results achieved by athletes from different nations at four major competitions where swimming events are (or were) competed. Results are based on major competitions according to FINA's historical records: the swimming and open water swimming events at the Olympic Games, the swimming and open water swimming events at the FINA World Aquatics Championships, the FINA Short Course Swimming World Championships and the defunct FINA World Open Water Swimming Championships.

Source: Wikipedia — Major achievements in swimming by nation (CC BY-SA 4.0)