Competitors for 2018 World Swimming Championships (25 m)
| Athlete | Country | Sports | Date of birth |
|---|---|---|---|
| Karla Abarca |  NCA |
SWI | 17 August 2001 |
| Abobakr Abass |  SUD |
SWI | 1 November 1998 |
| Kyle Abeysinghe |  NEU SRI |
SWI | 4 February 2000 |
| Domenico Acerenza |  ITA |
OWS/SWI | 19 January 1995 |
| Yalım Acımış |  TUR |
SWI | 8 November 1994 |
| Marcelo Acosta |  ESA |
SWI | 11 July 1996 |
| Taeyanna Adams |  FSM |
SWI | 14 March 2002 |
| Issa Al-Adawi |  OMA |
SWI | 20 March 1999 |
| Philip Adejumo |  NGR |
SWI | 8 August 1996 |
| Muhammad Ahmad |  BRU |
SWI | 23 February 1998 |
| Hamna Ahmed |  MDV |
SWI | 18 April 2003 |
| Ai Yanhan |  CHN |
SWI | 7 February 2002 |
| Bede Aitu |  COK |
SWI | 11 October 2001 |
| Sayaka Akase |  JPN |
SWI | 25 August 1994 |
| Roylin Akiwo |  PLW |
OWS/SWI | 26 June 2000 |
| Lara Aklouk |  JOR |
SWI | 2 August 2002 |
| Naima Akter |  BAN |
SWI | 7 February 1999 |
| Sonia Akter | BAN |
SWI | 15 July 1997 |
| Daniela Alfaro |  CRC |
SWI | 6 August 2002 |
| Daoud Ali Haroun |  DJI |
SWI | 23 March 2001 |
| Jasmine Alkhaldi | NEU PHI |
SWI | 20 June 1993 |
| Martin Allikvee |  EST |
SWI | 21 March 1995 |
| Brandonn Almeida |  BRA |
SWI | 16 March 1997 |
| Anas Altamari |  PLE |
SWI | 10 April 1997 |
| Bryan Álvarez | CRC |
SWI | 4 September 1999 |
| Amir Amrollahi |  IRI |
SWI | 2 January 2000 |
| An Ting-Yao |  TPE |
SWI | 26 August 1997 |
| Haley Anderson |  USA |
OWS/SWI | 20 November 1991 |
| Michael Andrew | USA |
SWI | 18 April 1999 |
| Lalanomena Anthony Andrianirina |  MAD |
SWI | 11 April 1998 |
| Ljupčo Angelovski |  MKD |
SWI | 27 February 1997 |
| Sophie Angus |  CAN |
SWI | 12 March 1999 |
| Tomomi Aoki | JPN |
SWI | 25 October 1994 |
| Anika Apostalon |  CZE |
SWI | 9 February 1995 |
| Raaidah Aqeel |  PAK |
SWI | 21 June 2003 |
| Gabriel Araya |  CHI |
SWI | 7 April 1999 |
| Isabella Arcila |  COL |
SWI | 11 March 1994 |
| Trinidad Ardiles | CHI |
SWI | 10 May 2003 |
| Ramah Arifi |  AFG |
SWI | 25 June 2003 |
| Sebastián Arispe |  PER |
SWI | 26 August 1992 |
| Jarod Arroyo |  PUR |
SWI | 2 January 2001 |
| Bradlee Ashby |  NZL |
SWI | 23 November 1995 |
| Merdan Ataýew |  TKM |
SWI | 8 May 1995 |
| Minna Atherton |  AUS |
SWI | 17 May 2000 |
| Alia Atkinson |  JAM |
SWI | 11 December 1988 |
| Mary Al-Atrash | PLE |
SWI | 27 June 1994 |
| Stephanie Au |  HKG |
SWI | 30 May 1992 |
| David Aubry |  FRA |
OWS/SWI | 8 November 1996 |
| Ekaterina Avramova |  BUL TUR |
SWI | 12 November 1991 |
| Alexandros Axiotis |  ZAM |
SWI | 11 March 1996 |
| Maayaa Ayawere |  GHA |
SWI | 3 September 2003 |
| Ardi Azman |  SGP |
SWI | 5 April 2003 |
| Mya Azzopardi |  MLT |
SWI | 29 September 2002 |
| Nuna Ba Matraf |  YEM |
SWI | 25 November 1999 |
| Mamadou Bah |  GUI |
SWI | 9 January 1999 |
| Hassan Baidar | YEM |
SWI | 31 July 1994 |
| Kathleen Baker | USA |
SWI | 28 February 1997 |
| Thimali Bandara | SRI |
SWI | 15 January 2002 |
| Azad Barazi |  SYR |
SWI | 4 January 1988 |
| Anthony Barbar |  LBN |
SWI | 18 November 1992 |
| Eisner Barberena | NCA |
SWI | 12 September 1994 |
| Safia Barkat | DJI |
SWI | 14 February 2001 |
| Holly Barratt | AUS |
SWI | 1 January 1988 |
| Armando Barrera |  CUB |
SWI | 18 November 1995 |
| Rafael Barreto | PHI |
SWI | |
| Omar Barry |  BUR |
SWI | 2 January 2000 |
| Artur Barseghyan |  ARM |
SWI | 29 March 2002 |
| İskender Başlakov | TUR |
SWI | 7 February 1990 |
| Guilherme Basseto | BRA |
SWI | 12 March 1997 |
| Nelson Batallones |  NMI |
SWI | |
| Batbayaryn Enkhkhüslen |  MGL |
SWI | 14 December 2001 |
| Alberto Batungbacal | PHI |
SWI | 18 November 1996 |
| Simona Baumrtová-Kubová | CZE |
SWI | 24 August 1991 |
| Alsu Bayramova |  AZE |
SWI | 29 December 2000 |
| Andrea Becali | CUB |
SWI | 24 April 2004 |
| Mohammed Omar Bedour | JOR |
SWI | 23 September 2000 |
| Isaac Beitía |  PAN |
SWI | 8 August 1995 |
| Grayson Bell | AUS |
SWI | 21 March 1997 |
| Abdulmalik Ben Musa |  LBA |
SWI | 11 January 1995 |
| Laura Benková |  SVK |
SWI | 11 May 2000 |
| Gunnar Bentz | USA |
SWI | 3 January 1996 |
| Seggio Bernardina |  CUR |
SWI | 13 August 1999 |
| Péter Bernek |  HUN |
SWI | 13 April 1992 |
| Andrea Berrino |  ARG |
SWI | 14 February 1994 |
| Ilaria Bianchi | ITA |
SWI | 6 January 1990 |
| Bence Biczó | HUN |
SWI | 19 January 1993 |
| Giorgi Biganishvili |  GEO |
SWI | 25 August 1997 |
| Simonas Bilis |  LTU |
SWI | 11 November 1993 |
| Alaa Binrajab |  BRN |
SWI | 22 September 2004 |
| Jannat Bique |  MOZ |
SWI | 16 May 1997 |
| Nikola Bjelajac |  BIH |
SWI | 12 May 1998 |
| Susann Bjørnsen |  NOR |
SWI | 28 May 1993 |
| Haley Black | CAN |
SWI | 8 October 1996 |
| Yolani Blake |  FIJ |
SWI | 19 August 1999 |
| Ali Boabbas |  KUW |
SWI | 6 January 2000 |
| Daniils Bobrovs |  LAT |
SWI | 8 October 1997 |
| Beril Böcekler | TUR |
SWI | 7 February 2004 |
| Lidia Boguslawska |  ISV |
SWI | 25 September 2001 |
| Thierry Bollin |  SUI |
SWI | 11 January 2000 |
| Nichita Bortnicov |  MDA |
SWI | 26 April 2002 |
| Marek Botík | SVK |
SWI | 28 June 1991 |
| Jeanne Boutbien |  SEN |
SWI | 8 April 1999 |
| Jolann Bovey | SUI |
SWI | 17 March 1996 |
| María Bramont-Arias | PER |
OWS/SWI | 13 August 1999 |
| Pit Brandenburger |  LUX |
SWI | 6 August 1995 |
| Kaloyan Bratanov | BUL |
SWI | 24 July 2000 |
| Lisa Bratton | USA |
SWI | 5 May 1996 |
| Nic Brown | AUS |
SWI | 8 March 1996 |
| Erika Brown-Connolly | USA |
SWI | 27 August 1998 |
| Annika Bruhn |  GER |
SWI | 5 October 1992 |
| Yousif Bu Arish |  KSA |
SWI | 25 November 2000 |
| Matelita Buadromo | FIJ |
OWS/SWI | 15 January 1996 |
| Ebrima Buaro |  GAM |
SWI | 16 September 2000 |
| Carla Buchanan | AUS |
SWI | 31 July 1995 |
| Siri Budcharern |  LAO |
SWI | 12 January 2002 |
| Veronica Burchill | USA |
SWI | 11 October 1997 |
| Federico Burdisso | ITA |
SWI | 20 September 2001 |
| Cameron van der Burgh |  RSA |
SWI | 25 May 1988 |
| Guido Buscaglia | ARG |
SWI | 8 October 1996 |
| Kim Busch |  NED |
SWI | 16 June 1998 |
| Shane Cadogan |  VIN |
SWI | 1 June 2001 |
| Cai Bing-Rong | TPE |
SWI | 17 December 1996 |
| Cao Jiwen | CHN |
SWI | 17 November 1997 |
| Thibaut Capitaine | FRA |
SWI | 26 April 1993 |
| Christoffer Carlsen |  SWE |
SWI | 6 May 1992 |
| Martina Carraro | ITA |
SWI | 21 June 1993 |
| Dylan Carter |  TTO |
SWI | 30 January 1996 |
| Diogo Carvalho |  POR |
SWI | 26 March 1988 |
| Arianna Castiglioni | ITA |
SWI | 15 August 1997 |
| María Castillo | PAN |
SWI | 21 April 2003 |
| Jessica Cattaneo | PER |
SWI | 8 December 1996 |
| Santiago Cavanagh |  BOL |
SWI | 2 August 1985 |
| Thomas Ceccon | ITA |
SWI | 27 January 2001 |
| Michael Chadwick | USA |
SWI | 15 April 1995 |
| Ida Cham | GAM |
SWI | 7 August 2004 |
| Chan Kin Lok | HKG |
SWI | 7 March 1994 |
| Chang Hou-Chi | TPE |
SWI | 28 October 1997 |
| Natthanan Chankrajang |  THA |
SWI | 13 April 1986 |
| Chao Man Hou |  MAC |
SWI | 21 February 1996 |
| Wendy Lagwena Charles |  SOL |
SWI | 26 February 2000 |
| Cheang Weng Lam | MAC |
SWI | 16 November 2000 |
| Chen Jie | CHN |
SWI | 28 February 1995 |
| Chen Szu-Chi | TPE |
SWI | 20 June 2002 |
| Brandon Cheong |  ARU |
SWI | 14 June 2001 |
| Souad Cherouati |  ALG |
OWS/SWI | 10 February 1989 |
| Cheuk Ming Ho | HKG |
SWI | 18 May 2002 |
| Pedro Chiancone |  URU |
SWI | 20 July 1997 |
| Marcelo Chierighini | BRA |
SWI | 15 January 1991 |
| Osisang Chilton | PLW |
OWS/SWI | 23 February 1996 |
| Svetlana Chimrova | NEU RUS |
SWI | 15 April 1996 |
| Tatiana Chișca | MDA |
SWI | 19 July 1995 |
| Petra Chocová | CZE |
SWI | 16 August 1986 |
| Kasipat Chograthin | THA |
SWI | 24 September 1994 |
| Henrik Christiansen | NOR |
SWI | 9 October 1996 |
| Apostolos Christou |  GRE |
SWI | 1 November 1996 |
| Chuang Mu-Lun | TPE |
SWI | 6 February 2001 |
| Matteo Ciampi | ITA |
SWI | 3 November 1996 |
| César Cielo Filho | BRA |
SWI | 10 January 1987 |
| Mathilde Cini | FRA |
SWI | 18 November 1994 |
| Carlos Claverie |  VEN |
SWI | 19 September 1996 |
| Piero Codia | ITA |
SWI | 22 October 1989 |
| Ryan Coetzee | RSA |
SWI | 12 August 1995 |
| Wilrich Coetzee | NZL |
SWI | 20 May 1997 |
| Michelle Coleman | SWE |
SWI | 31 October 1993 |
| Alessio Colonna | ITA |
SWI | 7 May 1998 |
| Mallory Comerford | USA |
SWI | 6 September 1997 |
| Santo Condorelli | CAN ITA USA |
SWI | 17 January 1995 |
| Jack Conger | USA |
SWI | 26 September 1994 |
| Breno Correia | BRA |
SWI | 19 February 1999 |
| Catalina Corró |  ESP |
SWI | 14 April 1995 |
| Ludovico Corsini | MOZ |
SWI | 3 May 1993 |
| Daniela Costa |  ANG |
SWI | 21 August 1996 |
| Niamh Coyne |  IRL |
SWI | 22 June 2001 |
| Édgar Crespo | PAN |
SWI | 11 May 1989 |
| Ilaria Cusinato | ITA |
SWI | 5 October 1999 |
| Konrad Czerniak |  POL |
SWI | 11 July 1989 |
| José Da Silva Viegas |  TLS |
SWI | 24 August 2003 |
| Domingos da Silva | TLS |
SWI | 12 November 1999 |
| Gustaf Dahlman | SWE |
SWI | 3 January 1997 |
| Thibaut Danho |  CIV |
SWI | 15 January 1994 |
| Clifton Daromani | SOL |
SWI | 29 October 1993 |
| Georgia Davies |  GBR WAL |
SWI | 11 October 1990 |
| Liam Davis |  ZIM |
SWI | 4 April 2000 |
| Noelani Day |  TGA |
SWI | 24 April 2003 |
| Cherantha de Silva | NEU SRI |
SWI | 12 July 1996 |
| Caitlin Deans | NZL |
SWI | 5 December 1999 |
| McKenna DeBever | PER |
SWI | 5 June 1996 |
| Kyle DeCoursey | USA |
SWI | 4 February 2000 |
| Gabriele Detti | ITA |
SWI | 29 August 1994 |
| Leonardo de Deus | BRA |
SWI | 18 January 1991 |
| Elena Di Liddo | ITA |
SWI | 8 September 1993 |
| Christian Diener | GER |
SWI | 3 June 1993 |
| Andrew Digby | THA |
SWI | 5 December 1993 |
| Delfina Dini | ARG |
SWI | 7 October 2001 |
| Senamile Dlamini |  SWZ |
SWI | 28 February 2003 |
| Simanga Dlamini | SWZ |
SWI | 8 October 1997 |
| Lorna Doorman | ZIM |
SWI/TRI | 15 April 1998 |
| Mikhail Dorinov | NEU RUS |
SWI | 9 August 1995 |
| Gabriella Doueihy | LBN |
SWI | 30 April 1999 |
| Hiba Doueihy | LBN |
SWI | 19 January 2001 |