The 2025 World Aquatics Championships, the 22nd edition of the World Aquatics Championships, were held in Singapore from 11 July to 3 August 2025. It was the first city in Southeast Asia to host the World Championships.
On 21 July 2019, World Aquatics (then FINA) selected Kazan, Russia as the host of the championship; the same day as Budapest, Hungary was selected for the 2027 edition. However, on 9 February 2023, Singapore was selected to replace Kazan as host city due to the Russian invasion of Ukraine.
Most of the competitions were held at the Singapore Sports Hub built for the 2015 Southeast Asian Games.
Organisers initially considered hosting the swimming events at the National Stadium or the Singapore Indoor Stadium, but eventually decided to build a temporary venue on the site of Car Park G (known as World Aquatics Championships Arena) for the swimming and artistic swimming events.
The theme of the 2025 World Aquatics Championships was "Water Shapes Us".
On 2 April 2025, the mascots were announced as Ollie, an otter, and Dewey, a dugong.
The initial competition schedule was announced on 18 June 2024. The detailed competition schedule was released on 12 December 2024.
203 countries, plus the Athlete Refugee Team and two Neutral Athletes teams (representing Belarusian and Russian athletes) competed.
The Championships were broadcast on the World Aquatics website which can be accessed worldwide. The competition was broadcast through the rights-holding broadcasters in various countries and regions:
2025 World Para Swimming Championships - also hosted by Singapore