Competitors for 2004 Swim World Cup
| Athlete | Country | Sports | Date of birth |
|---|---|---|---|
| Therèse Alshammar |  SWE |
SWI | 26 August 1977 |
| Yevgeny Alyoshin |  RUS |
SWI | 4 May 1979 |
| Randall Bal |  USA |
SWI | 14 November 1980 |
| Romain Barnier |  FRA MON |
SWI | 10 May 1976 |
| Alessio Boggiatto |  ITA |
SWI | 18 January 1981 |
| Melissa Caballero |  ESP |
SWI | 5 January 1985 |
| Marco di Carli |  GER |
SWI | 12 April 1985 |
| Céline Cartiaux | FRA |
SWI | 1979 |
| Dragoș Coman |  ROU |
SWI | 16 October 1980 |
| Chris Cook |  ENG GBR |
SWI | 5 May 1979 |
| Rebecca Cooke | ENG GBR |
SWI | 24 June 1983 |
| Petra Dallmann | GER |
SWI | 21 November 1978 |
| Ian Edmond | GBR |
SWI | 2 June 1978 |
| Gao Chang |  CHN |
SWI | 29 January 1987 |
| Ștefan Gherghel | ROU |
SWI | 18 August 1978 |
| James Gibson | ENG GBR |
SWI | 6 February 1980 |
| Stefan Herbst | GER |
SWI | 17 May 1978 |
| Hanae Ito |  JPN |
SWI | 18 January 1985 |
| Vytautas Janušaitis |  LTU |
SWI | 13 October 1981 |
| Brian Johns |  CAN |
SWI | 5 August 1982 |
| Mirna Jukic |  AUT |
SWI | 9 April 1986 |
| Simone Karn | GER |
SWI | 16 December 1978 |
| Kosuke Kitajima | JPN |
SWI | 22 September 1982 |
| Bartosz Kizierowski |  POL |
SWI | 20 February 1977 |
| Stanislava Komarova | RUS |
SWI | 12 June 1986 |
| Kristy Kowal | USA |
SWI | 9 October 1978 |
| Jason Lezak | USA |
SWI | 12 November 1975 |
| Oleh Lisohor |  UKR |
SWI | 17 January 1979 |
| Filippo Magnini | ITA |
SWI | 2 February 1982 |
| Melanie Marshall | ENG GBR |
SWI | 12 January 1982 |
| Takeshi Matsuda | JPN |
SWI | 23 June 1984 |
| José Meolans |  ARG |
SWI | 22 June 1978 |
| Malia Metella | FRA |
SWI | 23 February 1982 |
| Mike Mintenko | CAN |
SWI | 7 November 1975 |
| Martina Moravcová |  TCH SVK |
SWI | 16 January 1976 |
| Tomomi Morita | JPN |
SWI | 22 August 1984 |
| Ed Moses | USA |
SWI | 7 June 1980 |
| Mai Nakamura | JPN |
SWI | 16 July 1979 |
| Reiko Nakamura | JPN |
SWI | 17 May 1982 |
| Yuko Nakanishi | JPN |
SWI | 24 April 1981 |
| Ryk Neethling |  RSA |
SWI | 17 November 1977 |
| Pang Jiaying | CHN |
SWI | 6 January 1985 |
| Steve Parry | ENG GBR |
SWI | 2 March 1977 |
| Janine Pietsch | GER |
SWI | 30 June 1982 |
| Anne Poleska | GER |
SWI | 20 February 1980 |
| Camelia Potec | ROU |
SWI | 19 February 1982 |
| Yury Prilukov | RUS |
SWI | 14 June 1984 |
| Thomas Rupprath | GER |
SWI | 16 March 1977 |
| Andriy Serdinov | UKR |
SWI | 17 November 1982 |
| Alison Sheppard | GBR SCO |
SWI | 5 November 1972 |
| Nikolay Skvortsov | RUS |
SWI | 28 March 1984 |
| Stev Theloke | GER |
SWI | 18 January 1978 |
| Petria Thomas |  AUS |
SWI | 25 August 1975 |
| Jenny Thompson | USA |
SWI | 26 February 1973 |
| Liz van Welie |  NZL |
SWI | 17 November 1979 |
| Erika Villaécija | ESP |
OWS/SWI | 2 June 1984 |
| Lorenzo Vismara | ITA |
SWI | 10 August 1975 |
| Kerstin Vogel | GER |
SWI | 18 March 1985 |
| Arkady Vyatchanin | RUS |
SWI | 4 April 1984 |
| Wang Wei | CHN |
SWI | 1980 |
| Łukasz Wójt | GER POL |
SWI/TRI | 13 May 1982 |
| Yang Yu | CHN |
SWI | 6 February 1985 |
| Zhou Yafei | CHN |
SWI | 17 January 1984 |