The World Aquatics Junior Swimming Championships (commonly referred to as 'Junior World Championships' or 'Junior Worlds') is an international swimming championship event organized biennially by World Aquatics for swimmers aged 14–18 years as of 31 December of the year of the competition. It is usually held on odd years. Prior to 2023, the event was known as the FINA World Junior Swimming Championships and was open to female swimmers aged 14–17 and male swimmers aged 15–18 as of 31 December of the year of the competition.
Editions
| # | Year | Location | Dates | Swimmers | Countries | Events | Top nation |
|---|---|---|---|---|---|---|---|
| 1 | 2006 | Rio de Janeiro, Brazil | 22–27 August | 685 | 81 | 40 | Italy |
| 2 | 2008 | Monterrey, Mexico | 8–12 July | 480 | 61 | 40 | United States |
| 3 | 2011 | Lima, Peru | 16–21 August | 528 | 58 | 40 | United States |
| 4 | 2013 | Dubai, United Arab Emirates | 26–31 August | 900 | 95 | 42 | Australia |
| 5 | 2015 | Kallang, Singapore | 25–30 August | 700 | 87 | 42 | Australia |
| 6 | 2017 | Indianapolis, USA | 23–28 August | 619 | 90 | 42 | United States |
| 7 | 2019 | Budapest, Hungary | 20–25 August | 814 | 126 | 42 | United States |
| 8 | 2022 | Lima, Peru | 30 August – 4 September | 509 | 87 | 42 | Japan |
| 9 | 2023 | Netanya, Israel | 4–9 September | 648 | 93 | 42 | United States |
| 10 | 2025 | Otopeni, Romania | 19–24 August | +600 | +100 | 42 | United States |
Medal table
Last updated after the 2025 Championships
| Rank | Nation | Gold | Silver | Bronze | Total |
|---|---|---|---|---|---|
| 1 | United States | 95 | 75 | 65 | 235 |
| 2 | Australia | 41 | 30 | 26 | 97 |
| 3 | Russia | 35 | 40 | 42 | 117 |
| 4 | Japan | 33 | 42 | 38 | 113 |
| 5 | Italy | 27 | 37 | 49 | 113 |
| 6 | Canada | 18 | 26 | 33 | 77 |
| 7 | Hungary | 13 | 21 | 3 | 37 |
| 8 | Great Britain | 13 | 19 | 24 | 56 |
| 9 | Turkey | 13 | 2 | 3 | 18 |
| 10 | Spain | 12 | 7 | 12 | 31 |
| 11 | Poland | 12 | 6 | 13 | 31 |
| 12 | China | 11 | 14 | 12 | 37 |
| 13 | Ukraine | 11 | 4 | 5 | 20 |
| 14 | New Zealand | 10 | 2 | 1 | 13 |
| 15 | Lithuania | 7 | 4 | 4 | 15 |
| 16 | Romania | 6 | 5 | 4 | 15 |
| 17 | Germany | 5 | 12 | 5 | 22 |
| 18 | France | 5 | 6 | 10 | 21 |
| 19 | Neutral Athletes B | 5 | 5 | 5 | 15 |
| 20 | Brazil | 3 | 11 | 6 | 20 |
| 21 | South Africa | 3 | 6 | 9 | 18 |
| 22 | Greece | 3 | 3 | 6 | 12 |
| 23 | Croatia | 3 | 2 | 3 | 8 |
| 24 | Argentina | 3 | 2 | 2 | 7 |
| 25 | Ireland | 3 | 1 | 2 | 6 |
| 26 | Portugal | 3 | 0 | 0 | 3 |
| 27 | Czech Republic | 2 | 5 | 5 | 12 |
| 28 | Serbia | 2 | 5 | 3 | 10 |
| 29 | Austria | 2 | 3 | 4 | 9 |
| 30 | Denmark | 2 | 1 | 3 | 6 |
| 31 | Belgium | 2 | 1 | 0 | 3 |
| Bosnia and Herzegovina | 2 | 1 | 0 | 3 | |
| 33 | Hong Kong | 2 | 0 | 2 | 4 |
| 34 | Slovenia | 2 | 0 | 0 | 2 |
| 35 | Belarus | 1 | 3 | 1 | 5 |
| 36 | Bulgaria | 1 | 2 | 2 | 5 |
| South Korea | 1 | 2 | 2 | 5 | |
| 38 | Estonia | 1 | 1 | 1 | 3 |
| 39 | Trinidad and Tobago | 1 | 1 | 0 | 2 |
| 40 | Egypt | 1 | 0 | 1 | 2 |
| 41 | Indonesia | 1 | 0 | 0 | 1 |
| 42 | Sweden | 0 | 4 | 2 | 6 |
| 43 | Malaysia | 0 | 2 | 0 | 2 |
| 44 | Cyprus | 0 | 1 | 1 | 2 |
| 45 | Nigeria | 0 | 1 | 0 | 1 |
| 46 | Venezuela | 0 | 0 | 3 | 3 |
| 47 | Ecuador | 0 | 0 | 1 | 1 |
| Panama | 0 | 0 | 1 | 1 | |
| Slovakia | 0 | 0 | 1 | 1 | |
| Totals (49 entries) | 416 | 415 | 415 | 1,246 | |
Championships records
All records were set in finals unless noted otherwise. All times are swum in a long-course (50m) pool.
Men
| Event | Time | Name | Nationality | Date | Meet | Location | Ref | |
|---|---|---|---|---|---|---|---|---|
| 50m freestyle | 21.75 | h, = | Michael Andrew | United States | 25 August 2017 | 2017 Championships | Indianapolis, United States | |
| 50m freestyle | 21.75 | = | Michael Andrew | United States | 26 August 2017 | 2017 Championships | Indianapolis, United States | |
| 50m freestyle | 21.75 | sf, = | Nikita Sheremet | Ukraine | 21 August 2025 | 2025 Championships | Otopeni, Romania | |
| 100m freestyle | 47.07 | r | David Popovici | Romania | 30 August 2022 | 2022 Championships | Lima, Peru | |
| 200m freestyle | 1:45.15 | Carlos D'Ambrosio | Italy | 20 August 2025 | 2025 Championships | Otopeni, Romania | ||
| 400m freestyle | 3:46.06 | Gábor Zombori | Hungary | 20 August 2019 | 2019 Championships | Budapest, Hungary | ||
| 800m freestyle | 7:45.67 | Mack Horton | Australia | 28 August 2013 | 2013 Championships | Dubai, United Arab Emirates | ||
| 1500m freestyle | 14:46.09 | Franko Grgić | Croatia | 25 August 2019 | 2019 Championships | Budapest, Hungary | ||
| 50m backstroke | 24.44 | Ksawery Masiuk | Poland | 2 September 2022 | 2022 Championships | Lima, Peru | ||
| 100m backstroke | 52.91 | Ksawery Masiuk | Poland | 31 August 2022 | 2022 Championships | Lima, Peru | ||
| 200m backstroke | 1:56.05 | Pieter Coetze | South Africa | 4 September 2022 | 2022 Championships | Lima, Peru | ||
| 50m breaststroke | 26.95 | h | Jan Malte Grafe | Germany | 23 August 2025 | 2025 Championships | Otopeni, Romania | |
| 100m breaststroke | 59.01 | sf | Nicolò Martinenghi | Italy | 23 August 2017 | 2017 Championships | Indianapolis, United States | |
| 200m breaststroke | 2:07.32 | Filip Nowacki | Great Britain | 22 August 2025 | 2025 Championships | Otopeni, Romania | ||
| 50m butterfly | 22.96 | Diogo Ribeiro | Portugal | 3 September 2022 | 2022 Championships | Lima, Peru | ||
| 100m butterfly | 51.08 | Kristóf Milák | Hungary | 25 August 2017 | 2017 Championships | Indianapolis, United States | ||
| 200m butterfly | 1:53.87 | Kristóf Milák | Hungary | 28 August 2017 | 2017 Championships | Indianapolis, United States | ||
| 200m individual medley | 1:57.25 | Mikhail Shcherbakov | Neutral Athletes B | 20 August 2025 | 2025 Championships | Otopeni, Romania | ||
| 400m individual medley | 4:10.97 | Tomoyuki Matsushita | Japan | 8 September 2023 | 2023 Championships | Netanya, Israel | ||
| 4×100m freestyle relay | 3:15.38 |
| Neutral Athletes B | 19 August 2025 | 2025 Championships | Otopeni, Romania | ||
| 4×200m freestyle relay | 7:08.37 |
| United States | 23 August 2019 | 2019 Championships | Budapest, Hungary | ||
| 4×100m medley relay | 3:33.19 |
| Russia | 25 August 2019 | 2019 Championships | Budapest, Hungary |
Legend: # – Record awaiting ratification by FINA;
Records not set in finals: h – heat;
Records not set in finals: h – heat;
Women
| Event | Time | Name | Nationality | Date | Meet | Location | Ref | |
|---|---|---|---|---|---|---|---|---|
| 50m freestyle | 24.59 | = | Rikako Ikee | Japan | 28 August 2017 | 2017 Championships | Indianapolis, United States | |
| 50m freestyle | 24.59 | = | Olivia Wunsch | Australia | 9 September 2023 | 2023 Championships | Netanya, Israel | |
| 100m freestyle | 52.79 | Rylee Erisman | United States | 20 August 2025 | 2025 Championships | Otopeni, Romania | ||
| 200m freestyle | 1:56.25 | Yang Peiqi | China | 24 August 2025 | 2025 Championships | Otopeni, Romania | ||
| 400m freestyle | 4:05.38 | Yang Peiqi | China | 22 August 2025 | 2025 Championships | Otopeni, Romania | ||
| 800m freestyle | 8:22.49 | Lani Pallister | Australia | 21 August 2019 | 2019 Championships | Budapest, Hungary | ||
| 1500m freestyle | 15:58.86 | Lani Pallister | Australia | 24 August 2019 | 2019 Championships | Budapest, Hungary | ||
| 50m backstroke | 27.77 | sf | Kim Seung-won | South Korea | 22 August 2025 | 2025 Championships | Otopeni, Romania | |
| 100m backstroke | 59.11 | Regan Smith | United States | 24 August 2017 | 2017 Championships | Indianapolis, United States | ||
| 200m backstroke | 2:06.99 | Audrey Derivaux | United States | 20 August 2025 | 2025 Championships | Otopeni, Romania | ||
| 50m breaststroke | 29.86 | Rūta Meilutytė | Lithuania | 27 August 2013 | 2013 Championships | Dubai, United Arab Emirates | ||
| 100m breaststroke | 1:06.23 | sf | Eneli Jefimova | Estonia | 6 September 2023 | 2023 Championships | Netanya, Israel | |
| 200m breaststroke | 2:19.64 | Viktoriya Zeynep Gunes | Turkey | 30 August 2015 | 2015 Championships | Singapore, Singapore | ||
| 50m butterfly | 25.46 | Rikako Ikee | Japan | 26 August 2017 | 2017 Championships | Indianapolis, United States | ||
| 100m butterfly | 56.87 | Mizuki Hirai | Japan | 24 August 2025 | 2025 Championships | Otopeni, Romania | ||
| 200m butterfly | 2:07.20 | Lana Pudar | Bosnia and Herzegovina | 5 September 2023 | 2023 Championships | Netanya, Israel | ||
| 200m individual medley | 2:10.24 | Leah Hayes | United States | 7 September 2023 | 2023 Championships | Netanya, Israel | ||
| 400m individual medley | 4:34.34 | Agostina Hein | Argentina | 19 August 2025 | 2025 Championships | Otopeni, Romania | ||
| 4×100m freestyle relay | 3:35.53 |
| United States | 23 August 2025 | 2025 Championships | Otopeni, Romania | ||
| 4×200m freestyle relay | 7:51.47 |
| Canada | 23 August 2017 | 2017 Championships | Indianapolis, United States | ||
| 4×100m medley relay | 3:58.38 |
| Canada | 28 August 2017 | 2017 Championships | Indianapolis, United States |
Legend: # – Record awaiting ratification by FINA;
Records not set in finals: h – heat;
Records not set in finals: h – heat;
Mixed
| Event | Time | Name | Nationality | Date | Meet | Location | Ref | |
|---|---|---|---|---|---|---|---|---|
| 4x100 m freestyle relay | 3:24.29 |
| Australia | 6 September 2023 | 2023 Championships | Netanya, Israel | ||
| 4x100 m medley relay | 3:44.84 |
| United States | 21 August 2019 | 2019 Championships | Budapest, Hungary |
Legend: # – Record awaiting ratification by FINA;
Records not set in finals: h – heat;
Records not set in finals: h – heat;
See also
- FINA World Junior Diving Championships
- Swimming at the Youth Olympic Games
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