Masters Swimming Australia (MSA) is a national non-profit organisation for adult swimmers.

The MSA mission statement is:

To provide at club, state and national level an environment to encourage adults, regardless of age or ability, to swim regularly in order to promote fitness and improve their general health.

The organisation was constituted in 1975 and has over 7,000 members located in eight branches around Australia.

MSA membership through a club provides stroke correction, swimming education ,regular competitions, fun events, qualified coaches, social activities, newsletters, officials and coaching courses, insurance, motivation and great support to have you swimming better than you thought you could and it's more fun in a group than being on your own.