Competitors for 2021 International Swimming League (ISL)
| Athlete | Country | Sports | Date of birth |
|---|---|---|---|
| Bailey Andison |  CAN |
SWI | 13 November 1997 |
| Zach Apple |  USA |
SWI | 23 April 1997 |
| Guilherme Basseto |  BRA |
SWI | 12 March 1997 |
| Emilie Beckmann |  DEN |
SWI | 4 February 1997 |
| Tatiana Belonogoff |  GBR RUS |
SWI | 16 July 2001 |
| Thom de Boer |  NED |
SWI | 24 December 1991 |
| Annika Bruhn |  GER |
SWI | 5 October 1992 |
| Svetlana Chimrova |  NEU RUS |
SWI | 15 April 1996 |
| Costanza Cocconcelli |  ITA |
SWI | 26 January 2002 |
| Ali DeLoof | USA |
SWI | 14 August 1994 |
| Catie DeLoof | USA |
SWI | 12 February 1997 |
| Gabby DeLoof | USA |
SWI | 13 March 1996 |
| Joanna Evans |  BAH |
SWI | 25 July 1997 |
| Kornelia Fiedkiewicz |  POL |
SWI | 5 August 2001 |
| Felipe França | BRA |
SWI | 14 May 1987 |
| Ivan Giryov | NEU RUS |
SWI | 29 June 2000 |
| Robert Glință |  ROU |
SWI | 18 April 1997 |
| Zach Harting | USA |
SWI | 27 August 1997 |
| Mélanie Henique |  FRA |
SWI | 22 December 1992 |
| Isabella Hindley |  ENG GBR |
SWI | 1 October 1996 |
| Ryan Hoffer | USA |
SWI | 9 July 1998 |
| Anna Hopkin | ENG GBR |
SWI | 24 April 1996 |
| Ida Hulkko |  FIN |
SWI | 12 December 1998 |
| Takeshi Kawamoto |  JPN |
SWI | 19 February 1995 |
| Yasuhiro Koseki | JPN |
SWI | 14 March 1992 |
| Jakub Kraska | POL |
SWI | 19 April 2000 |
| Ranomi Kromowidjojo | NED |
SWI | 20 August 1990 |
| Joe Litchfield | ENG GBR |
SWI | 8 July 1998 |
| Jay Litherland | USA |
SWI | 24 August 1995 |
| Ingeborg Løyning |  NOR |
SWI | 13 September 2000 |
| Luiz Altamir | BRA |
SWI | 9 May 1996 |
| Linnea Mack | USA |
SWI | 27 November 1995 |
| Paige Madden | USA |
SWI | 22 October 1998 |
| Jakub Majerski | POL |
SWI | 18 August 2000 |
| Cody Miller | USA |
SWI | 9 January 1992 |
| Lorenzo Mora | ITA |
SWI | 30 September 1998 |
| Camden Murphy | USA |
SWI | 6 April 1999 |
| Leah Neale |  AUS |
SWI | 1 August 1995 |
| Nándor Németh |  HUN |
SWI | 19 November 1999 |
| Mark Nikolayev | RUS |
SWI | 30 July 1997 |
| Yui Ohashi | JPN |
SWI | 18 October 1995 |
| Marco Orsi | ITA |
FIN/SWI | 11 December 1990 |
| Jacob Pebley | USA |
SWI | 17 September 1993 |
| Erik Persson |  SWE |
SWI | 12 January 1994 |
| Stan Pijnenburg | NED |
SWI | 4 November 1996 |
| Alessandro Pinzuti | ITA |
SWI | 10 May 1999 |
| Veronika Popova-Andrusenko | RUS |
SWI | 20 January 1991 |
| Quah Ting Wen |  SGP |
SWI | 18 August 1992 |
| Cristian Quintero |  VEN |
SWI | 14 October 1992 |
| Bernhard Reitshammer |  AUT |
SWI | 17 June 1994 |
| Molly Renshaw | ENG GBR |
SWI | 6 May 1996 |
| Matt Richards | GBR WAL |
SWI | 17 December 2002 |
| Leonardo Coelho Santos | BRA |
SWI | 10 April 1995 |
| Nicholas Santos | BRA |
SWI | 14 February 1980 |
| Barbora Seemanová |  CZE |
SWI | 1 April 2000 |
| Daiya Seto | JPN |
SWI | 24 May 1994 |
| Aleksandr Shchogolev | NEU RUS |
SWI | 6 April 2002 |
| Brendon Smith | AUS |
SWI | 4 July 2000 |
| Pedro Spajari | BRA |
SWI | 18 February 1997 |
| Marrit Steenbergen | NED |
SWI | 11 January 2000 |
| Velimir Stjepanović |  SRB |
SWI | 7 August 1993 |
| Jenna Strauch | AUS |
SWI | 24 March 1997 |
| Kirill Strelnikov | NEU RUS |
SWI | 29 May 1992 |
| Grigory Tarasevich | RUS |
SWI | 1 August 1995 |
| Alicja Tchórz | POL |
SWI | 13 August 1992 |
| Matthew Temple | AUS |
SWI | 20 June 1999 |
| Aly Tetzloff | USA |
SWI | 18 March 1997 |
| Alys Thomas | GBR WAL |
SWI | 10 October 1990 |
| Miranda Tucker | USA |
SWI | 8 June 1997 |
| Darya Ustinova | NEU RUS |
SWI | 29 August 1998 |
| Sarah Vasey | ENG GBR |
SWI | 29 August 1996 |
| Andreas Vazaios |  GRE SWE |
SWI | 9 May 1994 |
| Kanako Watanabe | JPN |
SWI | 15 November 1996 |
| Jacob Whittle | ENG GBR |
SWI | 25 September 2004 |
| Abbie Wood | ENG GBR |
SWI | 2 March 1999 |
| Daryna Zevina |  UKR |
SWI | 1 September 1994 |