| Athlete | Country | Sports | Date of birth |
|---|---|---|---|
| Domenico Acerenza | OWS/SWI | 19 January 1995 | |
| Yalım Acımış | SWI | 8 November 1994 | |
| Andri Aedma | SWI | 5 July 1995 | |
| Jasper Aerents | SWI | 18 December 1992 | |
| Franci Aleksi | SWI | 9 November 1998 | |
| Martti Aljand | SWI | 22 November 1987 | |
| Fatimə Alkərəmova | SWI | 26 June 2002 | |
| Martin Allikvee | SWI | 21 March 1995 | |
| Kertu Ly Alnek | SWI | 14 September 1999 | |
| İlker Altınbilek | SWI | 12 September 1996 | |
| Evelyn Álvarez | SWI | 1 March 1993 | |
| Daniel Steen Andersen | SWI | 30 March 1995 | |
| Freya Anderson | SWI | 4 March 2001 | |
| Vyacheslav Andrusenko | SWI | 14 May 1992 | |
| Ljupčo Angelovski | SWI | 27 February 1997 | |
| Demir Atasoy | SWI | 26 May 1987 | |
| Charlotte Atkinson | SWI | 29 November 1996 | |
| Jonathan Atsu | SWI | 27 September 1996 | |
| Anastasiya Avdeyeva | SWI | 8 October 2001 | |
| Thomas Avetand | SWI | 24 July 1995 | |
| Ekaterina Avramova | SWI | 12 November 1991 | |
| Kaan Ayar | SWI | 19 January 1995 | |
| Metin Aydın | SWI | 26 February 1995 | |
| Mya Azzopardi | SWI | 29 September 2002 | |
| Helena Bach | SWI | 12 June 2000 | |
| Calum Bain | SWI | 27 December 1996 | |
| Andrej Barna | SWI | 6 March 1998 | |
| Márton Barta | SWI | 13 October 1999 | |
| Petr Bartůněk | SWI | 8 January 1991 | |
| Ege Başer | SWI | 14 June 1997 | |
| Jerome Kerim Basıkoğlu | SWI | 14 April 1994 | |
| İskender Başlakov | SWI | 7 February 1990 | |
| Martin Bau | SWI | 8 October 1994 | |
| Simona Baumrtová-Kubová | SWI | 24 August 1991 | |
| Valentin Bayer | SWI | 8 December 1999 | |
| Emilie Beckmann | SWI | 4 February 1997 | |
| Paul-Gabriel Bedel | SWI | 11 May 1994 | |
| Laura Benková | SWI | 11 May 2000 | |
| Péter Bernek | SWI | 13 April 1992 | |
| Ilaria Bianchi | SWI | 6 January 1990 | |
| Bence Biczó | SWI | 19 January 1993 | |
| Victoria Bierre | SWI | 23 August 2000 | |
| Giorgi Biganishvili | SWI | 25 August 1997 | |
| Simonas Bilis | SWI | 11 November 1993 | |
| Nikola Bjelajac | SWI | 12 May 1998 | |
| Tobias Bjerg | SWI | 21 April 1998 | |
| Susann Bjørnsen | SWI | 28 May 1993 | |
| Pernille Blume | SWI | 14 May 1994 | |
| Daniils Bobrovs | SWI | 8 October 1997 | |
| Thom de Boer | SWI | 24 December 1991 | |
| Jovana Bogdanović | SWI | 10 February 1992 | |
| Thierry Bollin | SWI | 11 January 2000 | |
| Niccolò Bonacchi | SWI | 1 November 1994 | |
| Charlotte Bonnet | SWI | 14 February 1995 | |
| Beatrix Bordás | SWI | 1 August 1992 | |
| Marek Botík | SWI | 28 June 1991 | |
| Joris Bouchaut | SWI | 27 June 1995 | |
| Lorys Bourelly | SWI | 27 May 1992 | |
| Jolann Bovey | SWI | 17 March 1996 | |
| Petar Bozhilov | SWI | 18 February 2000 | |
| Pit Brandenburger | SWI | 6 August 1995 | |
| Conor Brines | SWI | 23 July 1995 | |
| Sarah Bro | SWI | 4 March 1996 | |
| Signe Bro | SWI | 5 March 1999 | |
| Viktor Bromer | SWI | 20 April 1993 | |
| Christophe Brun | SWI | 8 March 1998 | |
| Hannah Brunzell | SWI | 22 March 2001 | |
| Dominik Bujak | SWI | 27 April 1999 | |
| Alina Bulmag | SWI | 6 September 1995 | |
| Katalin Burián | SWI | 17 January 1995 | |
| Kim Busch | SWI | 16 June 1998 | |
| Théo Bussière | SWI | 18 January 1995 | |
| Kimberly Buys | SWI | 23 April 1989 | |
| Basten Caerts | SWI | 27 October 1997 | |
| İlknur Nihan Çakıcı | SWI | 10 March 1996 | |
| Christoffer Carlsen | SWI | 6 May 1992 | |
| Martina Carraro | SWI | 21 June 1993 | |
| Diogo Carvalho | SWI | 26 March 1988 | |
| Arianna Castiglioni | SWI | 15 August 1997 | |
| Thomas Ceccon | SWI | 27 January 2001 | |
| Doğa Çelik | SWI | 28 May 1991 | |
| Tina Čelik | SWI | 24 April 2001 | |
| Adam Černek | SWI | 14 October 1999 | |
| Meiron Cheruti | SWI | 19 October 1997 | |
| Darya Chikunova | SWI | 12 April 1999 | |
| Petra Chocová | SWI | 16 August 1986 | |
| Filip Chrápavý | SWI | 3 April 1999 | |
| Henrik Christiansen | SWI | 9 October 1996 | |
| Apostolos Christou | SWI | 1 November 1996 | |
| Michał Chudy | SWI | 21 June 1997 | |
| Mathilde Cini | SWI | 18 November 1994 | |
| Piero Codia | SWI | 22 October 1989 | |
| Jordan Coelho | SWI | 2 April 1992 | |
| Michelle Coleman | SWI | 31 October 1993 | |
| Stina Colleou | SWI | 4 July 1993 | |
| Agueda Cons-Gestido | OWS/SWI | 23 November 2000 | |
| Melani Costa | SWI | 24 April 1989 | |
| Louis Croenen | SWI | 4 January 1994 | |
| László Cseh, Jr. | SWI | 3 December 1985 | |
| Ilaria Cusinato | SWI | 5 October 1999 | |
| Konrad Czerniak | SWI | 11 July 1989 | |
| Gustaf Dahlman | SWI | 3 January 1997 | |
| Camille Dauba | SWI | 10 January 1997 | |
| Sebastien de Meulemeester | SWI | 27 February 1998 | |
| Fanny Deberghes | SWI | 21 February 1994 | |
| Elena Di Liddo | SWI | 8 September 1993 | |
| Christian Diener | SWI | 3 June 1993 | |
| Antonio Djakovic | SWI | 8 October 2002 | |
| Yahor Dodaleu | SWI | 1 February 1993 | |
| Mikhail Dorinov | SWI | 9 August 1995 | |
| Luca Dotto | SWI | 18 April 1990 | |
| Mikhail Dovgalyuk | SWI | 3 June 1995 | |
| Dmytro Drobnych | SWI | 31 August 1996 | |
| Dániel Dudás | SWI | 20 April 1994 | |
| Cyrielle Duhamel | SWI | 6 January 2000 | |
| Valentine Dumont | SWI | 2 July 2000 | |
| Diana Durães | SWI | 8 June 1996 | |
| Tadas Duškinas | SWI | 27 April 1994 | |
| Mia Duus | SWI | 25 April 2001 | |
| Vár Eidesgaard | SWI | 18 March 2001 | |
| Vilma Ekström | SWI | 14 April 1994 | |
| Sezin Eligül | SWI | 29 May 1999 | |
| İmge Roza Erdemli | SWI | 15 January 2001 | |
| Caroline Erichsen | SWI | 1998 | |
| Hanna Eriksson | SWI | 12 April 1999 | |
| Timon Evenhuis | SWI | 20 August 1990 | |
| Margaux Fabre | SWI | 2 October 1992 | |
| Katja Fain | OWS/SWI | 31 August 2001 | |
| Francesca Falzon | SWI | 3 February 2001 | |
| Beatrice Felici | SWI | 4 April 2000 | |
| Conor Ferguson | SWI | 11 October 1999 | |
| Erika Ferraioli | SWI | 23 March 1986 | |
| Sergey Fesikov | SWI | 21 January 1989 | |
| Keis Fetishaj | SWI | 9 September 1999 | |
| Dávid Földházi | SWI | 6 January 1995 | |
| Tomer Frankel | SWI | 18 October 2000 | |
| Tomáš Franta | SWI | 18 April 1998 | |
| Gustav Friberg | SWI | 1997 | |
| Natalia Fryckowska | SWI | 12 February 1999 | |
| Regitze Gaard | SWI | 17 September 2001 | |
| Matt Galea | SWI | 24 May 1996 | |
| David Gamburg | SWI | 12 December 1993 | |
| Emily Gantriis | SWI | 29 May 1999 | |
| Marina García | SWI | 6 June 1994 | |
| Simone Geni | SWI | 25 October 1992 | |
| Erik Gidskehaug | SWI | 27 January 1997 | |
| Heiko Gigler | SWI | 17 June 1996 | |
| Kristian Gkolomeev | SWI | 4 July 1993 | |
| Robert Glință | SWI | 18 April 1997 | |
| Spiro Goga | SWI | 4 March 2001 | |
| Mathys Goosen | SWI | 18 May 1996 | |
| Rasim Gör | SWI | 19 October 1998 | |
| Nastja Govejšek | SWI | 15 July 1997 | |
| Lena Grabowski | SWI | 10 September 2002 | |
| Maria Grandt | SWI | 29 May 1998 | |
| Lara Grangeon de Villèle | OWS/SWI | 21 September 1991 | |
| Benjámin Grátz | SWI | 16 February 1996 | |
| Darragh Greene | SWI | 20 October 1995 | |
| Kathryn Greenslade | SWI | 18 January 1998 | |
| Philip Greve | SWI | 4 April 1998 | |
| Maxime Grousset | SWI | 24 April 1999 | |
| Robin Grünberger | SWI | 2 October 1998 | |
| Xaver Gschwentner | SWI | 26 August 1999 | |
| Viktoria Zeynep Güneş | SWI | 19 June 1998 | |
| Kemal Arda Gürdal | SWI | 2 July 1990 | |
| Ümit Can Güreş | SWI | 24 June 1999 | |
| Eygló Ósk Gústafsdóttir | SWI | 1 February 1995 | |
| Anastasiya Guzhenkova | SWI | 16 August 1997 | |
| Bence Gyárfás | SWI | 6 August 1993 | |
| Fanni Gyurinovics | SWI | 24 October 2001 | |
| Gergely Gyurta | OWS/SWI | 12 September 1991 | |
| Christoffer Haarsaker | SWI | 12 September 1993 | |
| Karolína Hájková | SWI | 14 December 1997 | |
| Ádám Halás | SWI | 2 August 1998 | |
| Marina Hansen | SWI | 28 February 1994 | |
| Sofie Hansen | SWI | 1 January 2002 | |
| Louise Hansson | SWI | 24 November 1996 | |
| Sophie Hansson | SWI | 2 August 1998 | |
| Julia Hassler | SWI | 27 February 1993 | |
| Caroline Hechenbichler | SWI | 11 August 2000 | |
| Niklas Hedegaard | SWI | 21 March 1990 | |
| Femke Heemskerk | SWI | 21 September 1987 | |
| Jacob Heidtmann | SWI | 6 November 1994 | |
| Silver Hein | SWI | 9 May 1997 | |
| Nea-Amanda Heinola | SWI | 16 October 2000 | |
| Philip Heintz | SWI | 21 February 1991 | |
| Mélanie Henique | SWI | 22 December 1992 | |
| Franziska Hentke | SWI | 4 June 1989 | |
| Anton Herrala | SWI | 29 December 1993 | |
| Danielle Hill | SWI | 27 September 1999 | |
| Susanne Hirvonen | SWI | 17 May 1997 | |
| Alvi Hjelm | SWI | 1 May 1996 | |
| Balázs Holló | SWI | 10 February 1999 | |
| Tamila Holub | SWI | 15 May 1999 | |
| Kristýna Horská | SWI | 30 September 1997 | |
| Dávid Horváth | SWI | 16 May 1996 | |
| Katinka Hosszú | SWI | 3 May 1989 | |
| Andriy Hovorov | SWI | 10 April 1992 | |
| Maj Howardsen | SWI | 12 January 1997 | |
| Claudia Hufnagl | SWI | 20 May 1996 |