Competitors for 1999 World Duathlon Championships
| Athlete | Country | Sports | Date of birth |
|---|---|---|---|
| Santiago Ascenço |  BRA |
TRI | 1980 |
| Simone Aschwanden |  SUI |
TRI | 1979 |
| Emma Carney |  AUS |
TRI | 29 July 1971 |
| Jurgen Dereere |  BEL |
TRI | 1972 |
| Jackie Gallagher | AUS |
ATH/TRI | 10 November 1967 |
| Raúl Llamazares |  ESP |
TRI | |
| Fiona Lothian |  GBR |
TRI | 1965 |
| Yann Millon |  FRA |
ATH/TRI | 26 March 1970 |
| Artur Osicki |  POL |
TRI | |
| Alejandro Pena |  MEX |
TRI | |
| Lenka Radová-Zemanová |  CZE |
TRI | 9 October 1979 |
| Natasha Yaremczuk-Filliol |  CAN |
TRI | 29 April 1980 |