Kowloon Tsai Swimming Pool, Swimming center in Kowloon City District, Hong Kong.

Kowloon Tsai Swimming Pool is a public pool complex in Kowloon Tsai Park, Kowloon City. Its first phase reopened on 11 September 2025 with a 50-metre indoor heated main pool (25 metres wide, 10 lanes, 1.4–1.9 metres deep) and a 1,200-seat spectator stand. An outdoor 25-metre training pool with a ramp, a leisure pool and a sunbathing area complete the site.

Construction began on 30 March 1962 under contractors Hung Yue and Co., after the Urban Council decided in 1958 to build a pool in Kowloon. Governor David Trench and Lady Trench opened the complex on 5 June 1964, when Sir David unveiled a memorial plaque and fired a pistol to start the first school swimming race. The Royal Hong Kong Jockey Club contributed over $2 million of the roughly $3.5 million cost.

The pool's opening in 1964 was marked by Governor David Trench firing a pistol to start the first school swimming race, and 2,000 children were invited to the ceremony. A memorial plaque unveiled at the entrance that day remains a detail to look for. The site was publicised internationally in a British Pathé newsreel.

The rebuilt complex reopened in stages: the indoor main pool opened on 11 September 2025, while the outdoor training pool, leisure pool and sunbathing area were still to follow. The indoor main pool is 50 by 25 metres with ten lanes and a depth of 1.4 to 1.9 metres; the outdoor training pool has a ramp for entering the water.

The pool's water originally came from a well sunk beneath Kowloon Tsai Park specifically for the facility. The site was levelled partly to provide a safer approach for aircraft landing at Kai Tak Airport.