Swimming New Zealand is the national governing body of swimming, in New Zealand. Swimming New Zealand, then known as The New Zealand Amateur Swimming Association was founded on 4 January 1890.

Swimming New Zealand is a member of FINA and has responsibility for elite performance, doping control and international relationships and events for the sports within New Zealand.

Swimming New Zealand is also a member of Water Safety New Zealand and has an active role in swim and survive education in New Zealand.

The New Zealand Amateur Swimming Association was founded on 4 January 1890 at the urging of the Auckland (Swimming) Club, and was based in Auckland. When the headquarters moved to Christchurch in 1896 the Auckland club withdrew from the Association and in 1898 formed a rival association, the New Zealand Amateur Swimming Association Registered. The two associations were reunited on 21 March 1904.

The first national championship events were held in the year the Association was formed, with a different carnival for each event until 1905 when all events were held at a single venue.

The first championship event for women was held in 1912.

The NZASA became the New Zealand Swimming Federation in 1988 and changed to its present name in 1999.

Swimming New Zealand announces a number of awards annually, most notably the New Zealand Swimmer of the Year Award.