Competitors for 2017 World Junior Swimming Championships
| Athlete | Country | Sports | Date of birth |
|---|---|---|---|
| Andrew Abruzzo |  USA |
SWI | 18 November 1999 |
| Nicolas Alberio | USA |
SWI | 1999 |
| Maksim Aleksandrov |  RUS |
SWI | 22 March 2001 |
| Freya Anderson |  ENG GBR |
SWI | 4 March 2001 |
| Michael Andrew | USA |
SWI | 18 April 1999 |
| Grace Ariola | USA |
SWI | 9 May 2000 |
| Zachary Attard |  AUS |
SWI | 18 June 1999 |
| Anastasiya Avdeyeva | RUS |
SWI | 8 October 2001 |
| Márton Barta |  HUN |
SWI | 13 October 1999 |
| Zoe Bartel | USA |
SWI | 3 October 2000 |
| Mikhail Bocharnikov | RUS |
SWI | 16 May 2000 |
| Michael Brinegar | USA |
OWS/SWI | 15 September 1999 |
| Jordan Brunt | AUS |
SWI | 22 June 1999 |
| Vasilisa Buinaya | RUS |
SWI | 27 April 2000 |
| Federico Burdisso |  ITA |
SWI | 20 September 2001 |
| Cody Bybee | USA |
SWI | 12 July 1999 |
| Patrick Callan | USA |
SWI | 6 October 1999 |
| Thomas Ceccon | ITA |
SWI | 27 January 2001 |
| Agueda Cons-Gestido |  ESP |
OWS/SWI | 23 November 2000 |
| Julia Cook | USA |
SWI | 28 August 2000 |
| Anja Crevar |  SRB |
SWI | 24 May 2000 |
| Leonardo Deplano | ITA |
SWI | 21 July 1999 |
| Kate Douglass | USA |
SWI | 17 November 2001 |
| Cyrielle Duhamel |  FRA |
SWI | 6 January 2000 |
| Conor Ferguson |  IRL NIR |
SWI | 11 October 1999 |
| Bobby Finke | USA |
SWI | 6 November 1999 |
| Carson Foster | USA |
SWI | 26 October 2001 |
| Ruslan Gaziev |  CAN |
SWI | 16 August 1999 |
| Vladislav Gerasimenko | RUS |
SWI | 26 April 2001 |
| Ivan Giryov |  NEU RUS |
SWI | 29 June 2000 |
| Hugo González | ESP |
SWI | 19 February 1999 |
| Georgy Goriachev | RUS |
SWI | 8 April 1999 |
| Maxime Grousset | FRA |
SWI | 24 April 1999 |
| Annabel Guye-Johnson | GBR |
SWI | 15 March 2000 |
| Jadey Hannah | CAN |
SWI | 24 January 2002 |
| Suzuka Hasegawa |  JPN |
SWI | 25 January 2000 |
| Johannes Hintze |  GER |
SWI | 5 July 1999 |
| Balázs Holló | HUN |
SWI | 10 February 1999 |
| Jemima Horwood | AUS |
SWI | 5 September 2001 |
| Rikako Ikee | JPN |
SWI | 4 July 2000 |
| Antani Ivanov |  BUL |
SWI | 17 July 1999 |
| Taj Jones | AUS |
SWI | 14 September 1999 |
| Sara Junevik |  SWE |
SWI | 14 February 2000 |
| Ákos Kalmár | HUN |
OWS/SWI | 11 January 2000 |
| Gleb Karasev | RUS |
SWI | 21 January 1999 |
| Antoni Kałużyński |  POL |
SWI | 3 October 1999 |
| Ajna Késely | HUN |
SWI | 10 September 2001 |
| Drew Kibler | USA |
SWI | 9 March 2000 |
| Eliza King | AUS |
SWI | 22 March 2001 |
| Anastasiya Kirpichnikova | FRA NEU RUS |
OWS/SWI | 24 June 2000 |
| Faith Knelson | CAN |
SWI | 9 September 2001 |
| Waka Kobori | JPN |
SWI | 10 August 2000 |
| Miku Kojima | JPN |
OWS/SWI | 13 May 2000 |
| Jakub Kraska | POL |
SWI | 19 April 2000 |
| Irina Krivonogova | RUS |
SWI | 3 May 2000 |
| Daniel Krueger | USA |
SWI | 11 June 1999 |
| Yegor Kuimov | RUS |
SWI | 4 July 1999 |
| Dávid Lakatos | HUN |
SWI | 25 March 1999 |
| Emily Large-Richards | ENG GBR |
SWI | 1 February 2001 |
| Jack LeVant | USA |
SWI | 3 October 1999 |
| Sofya Lobova | RUS |
SWI | 1 April 2001 |
| Leon MacAlister | AUS |
SWI | 25 July 2000 |
| Keanna MacInnes | GBR SCO |
SWI | 19 August 2001 |
| Martin Malyutin | RUS |
SWI | 5 July 1999 |
| Daniel Martin |  ROU |
SWI | 5 October 2000 |
| Nicolò Martinenghi | ITA |
SWI | 1 August 1999 |
| Richárd Márton | HUN |
SWI | 7 October 1999 |
| Gabe Mastromatteo | CAN |
SWI | 27 April 2002 |
| Mona McSharry | IRL |
SWI | 21 August 2000 |
| Kristóf Milák | HUN |
SWI | 20 February 2000 |
| Katarina Milutinovich | RUS SRB |
SWI | 13 January 2001 |
| Andrey Minakov | NEU RUS |
SWI | 17 March 2002 |
| Davide Nardini | ITA |
SWI | 29 March 1999 |
| Ella Nelson | USA |
SWI | 28 July 2001 |
| Nándor Németh | HUN |
SWI | 19 November 1999 |
| Polina Nevmovenko | RUS |
SWI | 17 June 2002 |
| Lucie Nordmann | USA |
SWI | 1 May 2000 |
| Penny Oleksiak | CAN |
SWI | 13 June 2000 |
| Karol Ostrowski | POL |
SWI | 2 September 1999 |
| Sayuki Ouchi | JPN |
SWI | 5 January 2002 |
| Kelly Pash | USA |
SWI | 27 March 2001 |
| Delfina Pignatiello |  ARG |
SWI | 19 April 2000 |
| Alessandro Pinzuti | ITA |
SWI | 10 May 1999 |
| Bartosz Piszczorowicz | POL |
SWI | 23 October 1999 |
| Yaroslav Potapov | RUS |
OWS/SWI | 1 July 1999 |
| Alexander Pratt | CAN |
SWI | 27 May 2000 |
| Alberto Razzetti | ITA |
SWI | 2 June 1999 |
| Daniel Roy | USA |
SWI | 17 January 2000 |
| Taylor Ruck | CAN |
SWI | 28 May 2000 |
| Natsumi Sakai | JPN |
SWI | 19 June 2001 |
| Yuya Sakamoto | JPN |
SWI | 3 October 1999 |
| Kayla Sanchez | CAN PHI |
SWI | 7 April 2001 |
| Anna Sasaki | JPN |
SWI | 29 January 2001 |
| Kieran Smith | USA |
SWI | 20 May 2000 |
| Rebecca Smith | CAN |
SWI | 14 March 2000 |
| Regan Smith | USA |
SWI | 9 February 2002 |
| Yevgeny Somov | RUS |
SWI | 28 January 1999 |
| Kacper Stokowski | POL |
SWI | 6 January 1999 |
| Zac Stubblety-Cook | AUS |
SWI | 4 January 1999 |
| Alex Sumner | USA |
SWI | 15 July 2000 |
| Nikita Tretyakov | RUS |
SWI | 28 January 1999 |
| Alex Walsh | USA |
SWI | 31 July 2001 |
| Emily Weiss | USA |
SWI | 19 March 2001 |
| Samuel Wendt | AUS |
SWI | 8 May 1999 |
| Reece Whitley | USA |
SWI | 3 January 2000 |
| Elijah Winnington | AUS |
SWI | 5 May 2000 |
| Polina Yegorova | RUS |
SWI | 25 February 2000 |
| Mabel Zavaros | CAN |
SWI | 29 March 2000 |
| Petr Zhikharev | RUS |
SWI | 9 October 1999 |