| Athlete | Country | Sports | Date of birth |
|---|---|---|---|
| Matt Abood | SWI | 28 June 1986 | |
| Aly Ackman | SWI | 6 February 1993 | |
| Natalie Adams | SWI | ||
| Nathan Adrian | SWI | 7 December 1988 | |
| Sayaka Akase | SWI | 25 August 1994 | |
| Coleman Allen | SWI | 9 February 1993 | |
| Haley Anderson | OWS/SWI | 20 November 1991 | |
| Miki Asayama | OWS | ||
| Jessica Ashwood | SWI | 28 April 1993 | |
| Gamal Assaad | SWI | ||
| Kathleen Baker | SWI | 28 February 1997 | |
| Bronte Barratt | SWI | 8 February 1989 | |
| Tabitha Baumann | SWI | 21 July 1995 | |
| Josh Beaver | SWI | 1 March 1993 | |
| Elizabeth Beisel | SWI | 18 August 1992 | |
| Carolina Bergamaschi | SWI | 16 May 1994 | |
| Rachel Bootsma | SWI | 15 December 1993 | |
| Dominique Bouchard | SWI | 29 May 1991 | |
| Alanna Bowles | SWI | 11 December 1997 | |
| Lauren Boyle | SWI | 14 December 1987 | |
| Lisa Bratton | SWI | 5 May 1996 | |
| William Brothers | SWI | 4 October 1994 | |
| Joe Byram | SWI | ||
| Hilary Caldwell | SWI | 13 March 1991 | |
| Bronte Campbell | SWI | 14 May 1994 | |
| Cate Campbell | SWI | 20 May 1992 | |
| Genevieve Cantin | SWI | 4 January 1991 | |
| Ana Carvalho | SWI | 14 February 1991 | |
| Tales Cerdeira | SWI | 21 January 1987 | |
| Chan Kin Lok | SWI | 7 March 1994 | |
| Geoffrey Cheah | SWI | 10 November 1990 | |
| Camille Lily Cheng | SWI | 9 May 1993 | |
| Heather Cheng | SWI | ||
| Cheng Hei Tung | SWI | ||
| Kent Cheung | SWI | 24 November 1992 | |
| Samantha Cheverton | SWI | 11 August 1988 | |
| Marcelo Chierighini | SWI | 15 January 1991 | |
| Tyler Clary | SWI | 12 March 1989 | |
| Samantha Cleverton | SWI | ||
| Ryan Cochrane | SWI | 29 October 1988 | |
| Ryan Coetzee | SWI | 12 August 1995 | |
| Kevin Cordes | SWI | 13 August 1993 | |
| Alicia Coutts | SWI | 14 September 1987 | |
| Tommaso D'Orsogna | SWI | 29 December 1990 | |
| Mack Darragh | SWI | 8 December 1993 | |
| Leonardo de Deus | SWI | 18 January 1991 | |
| Lyam Dias | SWI | ||
| Maya DiRado | SWI | 5 April 1993 | |
| Claire Donahue | SWI | 12 January 1989 | |
| Mitchell Donaldson | SWI | 10 December 1992 | |
| Dylan Dunlop-Barrett | SWI | 17 March 1991 | |
| Conor Dwyer | SWI | 10 January 1989 | |
| Matt Ellis | SWI | 21 December 1993 | |
| Ricky Ellis | SWI | 14 October 1987 | |
| Brittany Elmslie | SWI | 19 June 1994 | |
| Douglas Erasmus | SWI | 4 April 1990 | |
| Anthony Ervin | SWI | 26 May 1981 | |
| Eva Fabian | OWS | 3 August 1993 | |
| Jimmy Feigen | SWI | 26 September 1989 | |
| Nic Fink | SWI | 3 July 1993 | |
| Hali Flickinger | SWI | 7 July 1994 | |
| Sally Foster | SWI | 13 April 1985 | |
| Felipe França | SWI | 14 May 1987 | |
| Missy Franklin | SWI | 10 May 1995 | |
| Thomas Fraser-Holmes | SWI | 9 October 1991 | |
| Bruno Fratus | SWI | 30 June 1989 | |
| Takuro Fujii | SWI | 21 April 1985 | |
| Hiromasa Fujimori | SWI | 7 August 1991 | |
| Takeharu Fujimori | SWI | 17 February 1994 | |
| Richard Funk | SWI | 22 November 1992 | |
| Andrew Gemmell | OWS/SWI | 20 February 1991 | |
| João Gomes Júnior | SWI | 21 January 1986 | |
| Matt Grevers | SWI | 26 March 1985 | |
| Madeline Groves | SWI | 25 May 1995 | |
| Chelsea Gubecka | OWS/SWI | 8 September 1998 | |
| Guilherme Guido | SWI | 12 February 1987 | |
| Jayden Hadler | SWI | 23 September 1993 | |
| Kosuke Hagino | SWI | 15 August 1994 | |
| Joshua Hall | SWI | 12 April 1991 | |
| Ranmaru Harada | SWI | 17 December 1987 | |
| Jessica Hardy | SWI | 12 March 1987 | |
| Jordan Harrison | SWI | 9 June 1995 | |
| Eric Hedlin | OWS/SWI | 18 April 1993 | |
| Graciele Herrmann | SWI | 1 January 1992 | |
| Ayatsugu Hirai | SWI | 20 May 1993 | |
| Kenta Hirai | SWI | 7 May 1994 | |
| Yasunari Hirai | OWS/SWI | 2 April 1990 | |
| Belinda Hocking | SWI | 14 September 1990 | |
| Mack Horton | SWI | 25 April 1996 | |
| Natsumi Hoshi | SWI | 21 August 1990 | |
| Simon Huitenga | OWS | 4 March 1988 | |
| Chihiro Igarashi | SWI | 24 May 1995 | |
| Hirofumi Ikebata | SWI | 21 August 1992 | |
| Ryosuke Irie | SWI | 24 January 1990 | |
| Kenta Ito | SWI | 26 October 1990 | |
| Ewan Jackson | SWI | 7 May 1993 | |
| Connor Jaeger | SWI | 30 April 1991 | |
| Christine Jennings | OWS/SWI | 7 May 1987 | |
| Jiang Yuhui | SWI | 3 December 1991 | |
| Cullen Jones | SWI | 29 February 1984 | |
| Franko Jonker | SWI | ||
| Chase Kalisz | SWI | 7 March 1994 | |
| Marie Kamimura | SWI | 22 April 1994 | |
| Rie Kaneto | SWI | 8 September 1988 | |
| Steve Kent | SWI | 3 January 1988 | |
| Yumi Kida | OWS/SWI | 30 June 1985 | |
| Yuri Kisil | SWI | 18 September 1995 | |
| Yuki Kobori | SWI | 25 November 1993 | |
| Kristel Köbrich | OWS/SWI | 9 August 1985 | |
| Junya Koga | SWI | 19 July 1987 | |
| Kazuki Kohinata | SWI | 12 October 1994 | |
| Kong Kei Koi | SWI | ||
| Yvette Kong | SWI | 18 January 1993 | |
| Yasuhiro Koseki | SWI | 14 March 1992 | |
| Audrey Lacroix | SWI | 17 November 1983 | |
| Mitch Larkin | SWI | 9 July 1993 | |
| Breeja Larson | SWI | 16 April 1992 | |
| Claudia Lau | SWI | 11 November 1992 | |
| Micah Lawrence | SWI | 20 July 1990 | |
| Matson Lawson | SWI | 6 May 1992 | |
| Katie Ledecky | SWI | 17 March 1997 | |
| Flee Lee | SWI | 19 May 1992 | |
| Kareena Lee | OWS/SWI | 16 December 1993 | |
| Samantha Lee | SWI | 28 July 1992 | |
| Caitlin Leverenz | SWI | 26 February 1991 | |
| Liu Xiaoyu | SWI | 25 June 1988 | |
| Liu Yiru | SWI | 9 June 1995 | |
| Ryan Lochte | SWI | 3 August 1984 | |
| Madeline Locus | SWI | 29 July 1993 | |
| Marce Loubser | SWI | ||
| Lu Ying | SWI | 22 January 1989 | |
| João de Lucca | SWI | 6 January 1990 | |
| Samantha Lucie-Smith | SWI | 26 July 1992 | |
| Ma Tianchi | SWI | 21 January 1997 | |
| Brittany MacLean | SWI | 3 March 1994 | |
| James Magnussen | SWI | 11 April 1991 | |
| Travis Mahoney | SWI | 24 July 1990 | |
| Corey Main | SWI | 27 February 1995 | |
| Rhys Mainstone-Hodson | OWS/SWI | 27 February 1990 | |
| Sandrine Mainville | SWI | 20 March 1992 | |
| Raymond Mak | SWI | 1 September 1992 | |
| Beatrix Malan | SWI | ||
| Reed Malone | SWI | 3 April 1995 | |
| Becca Mann | OWS/SWI | 26 November 1997 | |
| Simone Manuel | SWI | 2 August 1996 | |
| Alessandra Marchioro | SWI | 13 May 1993 | |
| Melanie Margalis | SWI | 30 December 1991 | |
| Ivy Martin | SWI | 29 July 1993 | |
| Hayate Matsubara | SWI | 9 December 1991 | |
| Takeshi Matsuda | SWI | 23 June 1984 | |
| Yayoi Matsumoto | SWI | 8 March 1990 | |
| Michael McBroom | SWI | 16 May 1991 | |
| Martha McCabe | SWI | 4 August 1989 | |
| Cameron McEvoy | SWI | 13 May 1994 | |
| Ned McKendry | SWI | 4 July 1992 | |
| David McKeon | SWI | 25 July 1992 | |
| Emma McKeon | SWI | 24 May 1994 | |
| Taylor McKeown | SWI | 17 March 1995 | |
| Katie McLaughlin | SWI | 9 July 1997 | |
| Matt McLean | SWI | 13 May 1988 | |
| Keryn McMaster | SWI | 19 September 1993 | |
| Etiene Medeiros | SWI | 24 May 1991 | |
| Alex Meyer | OWS/SWI | 5 July 1988 | |
| Michael Meyer | SWI | 1 September 1992 | |
| Cody Miller | SWI | 9 January 1992 | |
| Yasuko Miyamoto | SWI | 3 September 1994 | |
| Yosuke Miyamoto | OWS/SWI | 23 August 1990 | |
| Vanessa Mohr | SWI | 7 March 1995 | |
| Mio Motegi | SWI | 21 March 1994 | |
| Ryan Murphy | SWI | 2 July 1995 | |
| Katsumi Nakamura | SWI | 21 February 1994 | |
| Miyu Nakano | SWI | 13 October 1997 | |
| Nam Ng Chun | SWI | ||
| Derick Ng | SWI | 18 May 1994 | |
| Kinve Nicholls | SWI | ||
| Marni Oldershaw | SWI | ||
| Nicolas Oliveira | SWI | 4 August 1987 | |
| Rika Omoto | SWI | 8 May 1997 | |
| Yuta Oshikiri | SWI | ||
| Miyu Otsuka | SWI | 19 July 1994 | |
| Emily Overholt | SWI | 4 October 1997 | |
| Jake Packard | SWI | 20 June 1994 | |
| Léonie Pamerleau | OWS/SWI | 24 March 1990 | |
| Park Tae-Hwan | SWI | 27 September 1989 | |
| Daynara de Paula | SWI | 25 July 1989 | |
| Jacob Pebley | SWI | 17 September 1993 | |
| Luke Peddie | SWI | 19 June 1993 | |
| Elizabeth Pelton | SWI | 26 November 1993 | |
| Thiago Pereira | SWI | 26 January 1986 | |
| Michael Phelps | SWI | 30 June 1985 | |
| Tim Phillips | SWI | 30 November 1990 | |
| Sydney Pickrem | SWI | 21 May 1997 | |
| Jared Pike | SWI | 1991 | |
| Andreína Pinto | OWS/SWI | 10 September 1991 | |
| David Plummer | SWI | 9 October 1985 | |
| Victoria Poon | SWI | 12 October 1984 | |
| Jarrod Poort | OWS/SWI | 31 October 1994 | |
| Josh Prenot | SWI | 28 July 1993 | |
| Qiu Ziao | SWI | 30 August 1998 | |
| Laura Quilter | SWI | 13 June 1992 |