The eighth edition of the Pan Pacific Swimming Championships, a long course (50 m) event, was held in 1999 at the Sydney International Aquatic Centre in Sydney, Australia, from 22–29 August. Only two swimmers per country could compete in finals, and only four swimmers per country could compete in semi-finals.

Michael George Klim, OAM is a Polish-born Australian swimmer, Olympic gold medallist, world champion, and former world record-holder of the 1990s and 2000s. He is known as the creator of straight arm freestyle.