| Athlete | Country | Sports | Date of birth |
|---|---|---|---|
| Kyle Abeysinghe | SWI | 4 February 2000 | |
| Javier Acevedo | SWI | 28 January 1998 | |
| Ismail Muthasim Adnan | SWI | 8 January 2001 | |
| Jasper Aerents | SWI | 18 December 1992 | |
| Lyubomir Agov | SWI | 20 September 1994 | |
| Muhammad Ahmad | SWI | 23 February 1998 | |
| Kokoe Ahyee | SWI | 6 July 1991 | |
| Ai Yanhan | SWI | 7 February 2002 | |
| Livingston Benedict Aika | SWI | 17 December 1996 | |
| Sayaka Akase | SWI | 25 August 1994 | |
| Franci Aleksi | SWI | 9 November 1998 | |
| Rafael Alfaro | SWI | 4 February 1992 | |
| Martti Aljand | SWI | 22 November 1987 | |
| Jasmine Alkhaldi | SWI | 20 June 1993 | |
| Fatimə Alkərəmova | SWI | 26 June 2002 | |
| Martin Allikvee | SWI | 21 March 1995 | |
| Adam Allouche | SWI | 24 March 1993 | |
| Brandonn Almeida | SWI | 16 March 1997 | |
| Kertu Ly Alnek | SWI | 14 September 1999 | |
| Bryan Álvarez | SWI | 4 September 1999 | |
| Tsubasa Amai | SWI | 21 July 1994 | |
| Brhane Amare | SWI | 28 September 1995 | |
| Amir Amrollahi | SWI | 2 January 2000 | |
| An Ting-Yao | SWI | 26 August 1997 | |
| Olivia Anderson | SWI | 30 May 1999 | |
| Robin Andreasson | SWI | 30 August 1988 | |
| Michael Andrew | SWI | 18 April 1999 | |
| Ljupčo Angelovski | SWI | 27 February 1997 | |
| Reona Aoki | SWI | 24 February 1995 | |
| Tomomi Aoki | SWI | 25 October 1994 | |
| Chaoili Aonzoudine | SWI | 7 June 1990 | |
| Daryl Appleton | SWI | 7 November 2000 | |
| Esteban Araya | SWI | 15 June 1996 | |
| Fernanda Archila | OWS/SWI | 21 February 1996 | |
| Isabella Arcila | SWI | 11 March 1994 | |
| Jarod Arroyo | SWI | 2 January 2001 | |
| María Arrúa | SWI | 3 March 1999 | |
| Valentina Artemyeva | FIN/SWI | 8 December 1986 | |
| Adil Assouab | SWI | 1 July 1992 | |
| Minna Atherton | SWI | 17 May 2000 | |
| Soule Soilihi Athoumane | SWI | 30 March 1991 | |
| Alia Atkinson | SWI | 11 December 1988 | |
| Salie Al-Atrash | SWI | 14 June 1995 | |
| Tano Atta | SWI | 7 December 1985 | |
| Felix Auböck | SWI | 19 December 1996 | |
| Annah Auckburaullee | SWI | 10 May 1999 | |
| Thomas Avetand | SWI | 24 July 1995 | |
| Emilio Ávila | OWS/SWI | 7 March 1998 | |
| Kevin Ávila | SWI | 22 December 1992 | |
| Ablam Awoussou | SWI | 8 May 1990 | |
| Alexandros Axiotis | SWI | 11 March 1996 | |
| Davíð Aðalsteinsson | SWI | 19 August 1990 | |
| Jeremy Bagshaw | SWI | 21 April 1992 | |
| Mamadou Bah | SWI | 9 January 1999 | |
| Deni Baholli | SWI | 30 June 1998 | |
| Dara Al-Bakry | SWI | 6 October 2000 | |
| Khader Baqlah | SWI | 15 September 1998 | |
| Rahaf Baqleh | SWI | 26 April 1998 | |
| Marcos Barale | SWI | 21 January 1987 | |
| Azad Barazi | SWI | 4 January 1988 | |
| Anthony Barbar | SWI | 18 November 1992 | |
| Eisner Barberena | SWI | 12 September 1994 | |
| Adam Barrett | SWI | 30 July 1992 | |
| Márton Barta | SWI | 13 October 1999 | |
| Petr Bartůněk | SWI | 8 January 1991 | |
| Diana Basho | SWI | 5 December 2000 | |
| İskender Başlakov | SWI | 7 February 1990 | |
| Alard Basson | SWI | 16 February 1996 | |
| Alaric Basson | SWI | 16 February 1996 | |
| Batbayaryn Enkhkhüslen | SWI | 14 December 2001 | |
| Alberto Batungbacal | SWI | 18 November 1996 | |
| Martin Bau | SWI | 8 October 1994 | |
| Simona Baumrtová-Kubová | SWI | 24 August 1991 | |
| Alfonso Bautista | SWI | 1 August 1997 | |
| Jarryd Baxter | SWI | 23 March 1999 | |
| Christian Bayo | OWS/SWI | 12 April 1991 | |
| Emilie Beckmann | SWI | 4 February 1997 | |
| Mireia Belmonte | OWS/SWI | 10 November 1990 | |
| Colin Bensadon | SWI | 20 January 1988 | |
| Frenc Berdaku | SWI | 15 August 2000 | |
| Péter Bernek | SWI | 13 April 1992 | |
| Andrea Berrino | SWI | 14 February 1994 | |
| Adil Bharmal | SWI | 21 December 1999 | |
| Mawouna Bidah | SWI | 15 December 1980 | |
| Simonas Bilis | SWI | 11 November 1993 | |
| Jesper Björk | SWI | 5 December 1993 | |
| Susann Bjørnsen | SWI | 28 May 1993 | |
| Marko Blaževski | SWI | 10 November 1992 | |
| Jason Block | SWI | 28 December 1989 | |
| Daniils Bobrovs | SWI | 8 October 1997 | |
| Anastasia Bogdanovski | SWI | 30 July 1993 | |
| Charlie Boldison | SWI | 28 July 1992 | |
| Devin Boodha | SWI | 30 March 2001 | |
| Maeform Borriello | SWI | 12 October 1999 | |
| Marek Botík | SWI | 28 June 1991 | |
| Joris Bouchaut | SWI | 27 June 1995 | |
| Jeanne Boutbien | SWI | 8 April 1999 | |
| Pit Brandenburger | SWI | 6 August 1995 | |
| Sarah Bro | SWI | 4 March 1996 | |
| Signe Bro | SWI | 5 March 1999 | |
| Viktor Bromer | SWI | 20 April 1993 | |
| Peter Brothers | SWI | 19 September 1996 | |
| Myles Brown | SWI | 21 May 1992 | |
| Russell Brown | SWI | 14 March 1998 | |
| Annika Bruhn | SWI | 5 October 1992 | |
| Sylvia Brunlehner | SWI | 13 February 1994 | |
| Aleksey Bryansky | SWI | 14 September 1997 | |
| Maarten Brzoskowski | SWI | 19 September 1995 | |
| Matelita Buadromo | OWS/SWI | 15 January 1996 | |
| Carla Buchanan | SWI | 31 July 1995 | |
| Sultan Bukeev | SWI | 31 May 1997 | |
| Daniil Bukin | SWI | 24 March 1994 | |
| Cameron van der Burgh | SWI | 25 May 1988 | |
| Kim Busch | SWI | 16 June 1998 | |
| Kimberly Buys | SWI | 23 April 1989 | |
| Walter Caballero | OWS/SWI | ||
| Lani Cabrera | SWI | 22 April 1993 | |
| Jeancarlo Calderón | SWI | 10 July 1999 | |
| Hilary Caldwell | SWI | 13 March 1991 | |
| Kelsie Campbell | SWI | 10 April 1998 | |
| Giacomo Carini | SWI | 2 July 1997 | |
| Christoffer Carlsen | SWI | 6 May 1992 | |
| Mattias Carlsson | SWI | 16 May 1990 | |
| Martina Carraro | SWI | 21 June 1993 | |
| Dylan Carter | SWI | 30 January 1996 | |
| Diogo Carvalho | SWI | 26 March 1988 | |
| Alma Castillo | SWI | 29 January 1996 | |
| Jessica Cattaneo | SWI | 8 December 1996 | |
| Santiago Cavanagh | SWI | 2 August 1985 | |
| Macarena Ceballos | SWI | 12 January 1995 | |
| Andrea Cedrón | FIN/SWI | 24 December 1993 | |
| Michael Chadwick | SWI | 15 April 1995 | |
| Sompathana Chamberlain | SWI | 22 August 2001 | |
| Darren Chan | SWI | 1995 | |
| Chan Kin Lok | SWI | 7 March 1994 | |
| Marina Chan | SWI | 24 December 1997 | |
| Tayamika Chang'anamuno | SWI | 1 July 2000 | |
| Natthanan Chankrajang | SWI | 13 April 1986 | |
| Chao Man Hou | SWI | 21 February 1996 | |
| Konstantinos Chatzittooulis | SWI | 25 May 1999 | |
| Cheang Weng Lam | SWI | 16 November 2000 | |
| Chen Jie | SWI | 28 February 1995 | |
| Cheng Pirort | SWI | 5 April 1986 | |
| Christopher Cheong | SWI | 30 October 1996 | |
| Gorazd Chepishevski | SWI | 16 March 1993 | |
| Souad Cherouati | OWS/SWI | 10 February 1989 | |
| Kent Cheung | SWI | 24 November 1992 | |
| Osisang Chilton | OWS/SWI | 23 February 1996 | |
| Svetlana Chimrova | SWI | 15 April 1996 | |
| Tatiana Chișca | SWI | 19 July 1995 | |
| Cho Cheng-Chi | OWS/SWI | 21 October 1998 | |
| Petra Chocová | SWI | 16 August 1986 | |
| Choi Weng Tong | SWI | 30 December 1996 | |
| Chou Wei-Liang | SWI | 25 November 1996 | |
| Henrik Christiansen | SWI | 9 October 1996 | |
| Apostolos Christou | SWI | 1 November 1996 | |
| Christie May Chue | SWI | 3 July 2000 | |
| Marta Ciesla | SWI | 13 October 1998 | |
| Tiareth Cijntje | SWI | 1 April 2001 | |
| Mathilde Cini | SWI | 18 November 1994 | |
| Pace Clark | SWI | 24 June 1994 | |
| William Clark | SWI | 5 February 1993 | |
| Carlos Claverie | SWI | 19 September 1996 | |
| Georgia Coates | SWI | 19 February 1999 | |
| Ivan Cocunubo | SWI | 23 August 1993 | |
| David van der Colff | SWI | 29 April 1997 | |
| Mallory Comerford | SWI | 6 September 1997 | |
| Catharine Cooper | SWI | 3 December 1999 | |
| Kaylene Corbett | SWI | 15 June 1999 | |
| Jonas Coreelman | SWI | 19 July 1991 | |
| Tristan Cote | SWI | 14 December 1995 | |
| Christopher Courtis | SWI | 13 February 1994 | |
| Madisyn Cox | SWI | 30 May 1995 | |
| Louis Croenen | SWI | 4 January 1994 | |
| Elijah Cruz | SWI | 28 November 2000 | |
| Tommaso D'Orsogna | SWI | 29 December 1990 | |
| Thibaut Danho | SWI | 15 January 1994 | |
| Sarah Darcel | SWI | 25 May 1999 | |
| Mack Darragh | SWI | 8 December 1993 | |
| Georgia Davies | SWI | 11 October 1990 | |
| Kathleen Dawson | SWI | 3 October 1997 | |
| Aaron de Freitas | SWI | 23 October 2001 | |
| Angel Felice de Jesús | SWI | 14 March 1999 | |
| James Deiparine | SWI | 4 January 1993 | |
| Nicolaas Dekker | SWI | 2 December 1995 | |
| Kejsi Delli | SWI | 10 December 1998 | |
| Ali DeLoof | SWI | 14 August 1994 | |
| Jean Dencausse | SWI | 8 September 1997 | |
| Jérémy Desplanches | SWI | 7 August 1994 | |
| Gabriele Detti | SWI | 29 August 1994 | |
| Leonardo de Deus | SWI | 18 January 1991 | |
| Abrahm DeVine | SWI | 3 September 1996 | |
| Silvia Di Pietro | SWI | 6 April 1993 | |
| Mamadou Diallo | SWI | 27 December 1982 | |
| Johannes Dietrich | SWI | 5 October 1993 | |
| Simphiwe Dlamini | SWI | 15 July 1999 | |
| Juan José Dobles | SWI | 23 November 1989 | |
| Keanan Dols | SWI | 24 July 1998 | |
| Dong Jie | SWI | 31 October 1998 | |
| Abdullah Al-Doori | SWI | 13 December 1998 |