2023 World Aquatics Junior Swimming Championships

The 9th World Aquatics Junior Swimming Championships were held in Netanya, Israel, at the Wingate Institute from 4 to 9 September 2023. These championships were the first to be held under the new World Aquatics name and branding. The age groups for these championships were altered slightly from the previous championships in 2022, with the equalisation of age groups to 14-18 years for both genders (athletes age as of 31 December 2023). In total 648 athletes from 93 member federations competed at the championships. Due to the status of their member federation athletes from the Philippines were required to compete as 'Neutral Independent Athletes'. Three large member federations opted not to compete at these championships, being Great Britain, France, and Hungary.

The United States of America topped the medal tally and were awarded the World Aquatics Team of the Championships award. Ukraine's Oleksandr Zheltiakov was awarded the World Aquatics Male Swimmer of the Championships award and Bosnia and Herzegovina’s Lana Pudar was awarded the World Aquatics Female Swimmer of the Championships award.

Men
Swimmers who participated in the heats only and received medals.

Women
Swimmers who participated in the heats only and received medals.

Mixed
Swimmers who participated in the heats only and received medals.

Records
The following junior world and championship records were set during the competition.

Championship records
''Note: The first version of the results erroneously recognized 3 performances as records. The Women's 50m Breaststroke results recorded championship record performances from Alexanne Lepage and Eneli Jefimova in the heats. Likewise, the performance from Kuzey Tuncelli in the final of the Men's 800m Freestyle was recognized as a championship record. Each performance was slower than the existing championship record. All results were later amended.