Competitors for 2003 Swim World Cup
| Athlete | Country | Sports | Date of birth |
|---|---|---|---|
| Therèse Alshammar |  SWE |
SWI | 26 August 1977 |
| Yevgeny Alyoshin |  RUS |
SWI | 4 May 1979 |
| Cezar Bădiță |  ROU |
SWI | 12 April 1979 |
| Zoë Baker |  ENG GBR NZL |
SWI | 29 February 1976 |
| Lindsay Benko |  USA |
SWI | 29 November 1976 |
| Valerio Cleri |  ITA |
OWS/SWI | 19 June 1981 |
| Dragoș Coman | ROU |
SWI | 16 October 1980 |
| Sylvain Cros |  FRA |
SWI | 2 June 1980 |
| Simon Dufour | FRA |
SWI | 20 February 1979 |
| Hanna Eriksson | SWE |
SWI | 18 September 1984 |
| Răzvan Florea | ROU |
SWI | 29 September 1980 |
| Mark Foster | ENG GBR |
SWI | 12 May 1970 |
| Felicity Galvez |  AUS |
SWI | 4 March 1985 |
| James Gibson | ENG GBR |
SWI | 6 February 1980 |
| Michael Gilliam | USA |
SWI | 1979 |
| Lena Hallander | SWE |
SWI | 1982 |
| Pam Hanson | USA |
SWI | 1979 |
| Brent Hayden |  CAN |
SWI | 21 October 1983 |
| Toni Helbig |  GER |
SWI | 1982 |
| Aliaksandra Herasimenia |  BLR |
SWI | 31 December 1985 |
| James Hickman | ENG GBR |
SWI | 2 February 1976 |
| Julie Hjorth-Hansen |  DEN |
SWI | 10 June 1984 |
| Emma Igelström | SWE |
SWI | 6 March 1980 |
| Salim Iles |  ALG |
SWI | 14 May 1975 |
| Noriko Inada |  JPN |
SWI | 27 July 1978 |
| Brian Johns | CAN |
SWI | 5 August 1982 |
| Anna-Karin Kammerling | SWE |
SWI | 19 October 1980 |
| Dean Kent | NZL |
SWI | 6 November 1978 |
| Kosuke Kitajima | JPN |
SWI | 22 September 1982 |
| Bartosz Kizierowski |  POL |
SWI | 20 February 1977 |
| Yana Klochkova |  UKR |
SWI | 7 August 1982 |
| Joshua Krogh | AUS |
SWI | 3 April 1982 |
| Sara Larsson | SWE |
SWI | 15 December 1983 |
| Rhiannon Leier | CAN |
SWI | 30 May 1977 |
| Jason Lezak | USA |
SWI | 12 November 1975 |
| Josefin Lillhage | SWE |
SWI | 15 March 1980 |
| Oleh Lisohor | UKR |
SWI | 17 January 1979 |
| Tom Malchow | USA |
SWI | 18 August 1976 |
| Igor Marchenko | RUS |
SWI | 26 November 1975 |
| Mike Mintenko | CAN |
SWI | 7 November 1975 |
| Martina Moravcová |  TCH SVK |
SWI | 16 January 1976 |
| Mai Nakamura | JPN |
SWI | 16 July 1979 |
| Atsushi Nishikori | JPN |
SWI | 1978 |
| Helen Norfolk | NZL |
SWI | 27 August 1981 |
| Jarno Pihlava |  FIN |
SWI | 14 May 1979 |
| Jim Piper | AUS |
SWI | 13 August 1981 |
| Maxim Podoprigora |  AUT |
SWI | 18 April 1978 |
| Camelia Potec | ROU |
SWI | 19 February 1982 |
| Sarah Price | ENG GBR |
SWI | 19 April 1979 |
| Gabrielle Rose |  BRA USA |
SWI | 1 November 1977 |
| Roland Schoeman |  RSA |
SWI | 3 July 1980 |
| Alison Sheppard | GBR SCO |
SWI | 5 November 1972 |
| Roman Sludnov | RUS |
SWI | 24 February 1980 |
| Chantal Strasser |  SUI |
SWI | 21 March 1978 |
| Tang Jingzhi |  CHN |
SWI | 15 September 1986 |
| Aya Terakawa | JPN |
SWI | 12 November 1984 |
| Ian Thorpe | AUS |
SWI | 13 October 1982 |
| Elizabeth Warden | CAN |
SWI | 3 February 1978 |
| Tarnee White | AUS |
SWI | 17 October 1981 |
| Yang Yu | CHN |
SWI | 6 February 1985 |
| Yurie Yano | JPN |
SWI | 24 June 1988 |
| Zheng Jing | CHN |
OWS/SWI | 6 January 1987 |
| Louise Ørnstedt | DEN |
SWI | 23 March 1985 |