Competitors for 2003 Swim World Cup
| Athlete | Country | Sports | Date of birth |
|---|---|---|---|
| Therèse Alshammar |  SWE |
SWI | 26 August 1977 |
| Ashley Anderson |  AUS |
SWI | 30 September 1984 |
| Zoë Baker |  ENG GBR NZL |
SWI | 29 February 1976 |
| Amanda Beard |  USA |
SWI | 29 October 1981 |
| Lindsay Benko | USA |
SWI | 29 November 1976 |
| Andrew Burns | AUS |
SWI | |
| Céline Cartiaux |  FRA |
SWI | 1979 |
| Andrea Cassidy | USA |
SWI | 1982 |
| Chen Hua |  CHN |
SWI | 20 October 1982 |
| Haley Cope | USA |
SWI | 11 April 1979 |
| Natalie Coughlin | USA |
SWI | 23 August 1982 |
| Josh Davis | USA |
SWI | 1 September 1972 |
| David Denniston | USA |
SWI | 1978 |
| Simon Dufour | FRA |
SWI | 20 February 1979 |
| Mark Foster | ENG GBR |
SWI | 12 May 1970 |
| Michael Gilliam | USA |
SWI | 1979 |
| Pam Hanson | USA |
SWI | 1979 |
| James Hickman | ENG GBR |
SWI | 2 February 1976 |
| Pieter van den Hoogenband |  NED |
SWI | 14 March 1978 |
| Emma Igelström | SWE |
SWI | 6 March 1980 |
| Anna-Karin Kammerling | SWE |
SWI | 19 October 1980 |
| Alenka Kejžar |  SLO |
SWI | 15 February 1979 |
| Tamás Kerékjártó |  HUN |
SWI | 9 July 1979 |
| Bartosz Kizierowski |  POL |
SWI | 20 February 1977 |
| Rachel Komisarz | USA |
SWI | 5 December 1976 |
| Robert Kroll |  GER |
SWI | 1979 |
| Georgina Lee | ENG GBR |
SWI | 14 August 1981 |
| Jason Lezak | USA |
SWI | 12 November 1975 |
| Josefin Lillhage | SWE |
SWI | 15 March 1980 |
| Oleh Lisohor |  UKR |
SWI | 17 January 1979 |
| Adam Lucas | AUS |
SWI | 27 October 1983 |
| Igor Marchenko |  RUS |
SWI | 26 November 1975 |
| José Meolans |  ARG |
SWI | 22 June 1978 |
| Ben Michaelson | USA |
SWI | 13 November 1981 |
| Martina Moravcová |  TCH SVK |
SWI | 16 January 1976 |
| Ryk Neethling |  RSA |
SWI | 17 November 1977 |
| Sara Nordenstam |  NOR SWE |
SWI | 28 February 1983 |
| Pang Jiaying | CHN |
SWI | 6 January 1985 |
| Michael Phelps | USA |
SWI | 30 June 1985 |
| Maxim Podoprigora |  AUT |
SWI | 18 April 1978 |
| Anne Poleska | GER |
SWI | 20 February 1980 |
| Brenton Rickard | AUS |
SWI | 19 October 1983 |
| Flavia Rigamonti |  SUI |
SWI | 1 July 1981 |
| Adolfo Rivabeneira |  ECU |
OWS/SWI | 1983 |
| Gabrielle Rose |  BRA USA |
SWI | 1 November 1977 |
| Cathleen Rund | GER |
OWS/SWI | 3 November 1977 |
| Thomas Rupprath | GER |
SWI | 16 March 1977 |
| Courtney Shealy | USA |
SWI | 12 December 1977 |
| Alison Sheppard | GBR SCO |
SWI | 5 November 1972 |
| Roman Sludnov | RUS |
SWI | 24 February 1980 |
| Graeme Smith | GBR SCO |
SWI | 31 March 1976 |
| Chris Stewart | RSA |
SWI | 15 February 1978 |
| Květoslav Svoboda |  CZE |
OWS/SWI | 25 August 1982 |
| Masami Tanaka |  JPN |
SWI | 5 January 1979 |
| Jenny Thompson | USA |
SWI | 26 February 1973 |
| Neil Walker | USA |
SWI | 25 June 1976 |
| Tom Wilkens | USA |
SWI | 25 November 1975 |
| Yu Cheng | CHN |
SWI | 1983 |
| Nina Zhivanevskaya |  CIS RUS URS ESP |
SWI | 24 June 1977 |
| Zhou Yafei | CHN |
SWI | 17 January 1984 |