Competitors for 1966 World Cyclo-Cross Championships
| Athlete | Country | Sports | Date of birth |
|---|---|---|---|
| Dietmar Allgaier |  GER |
CYC | |
| John Atkins |  GBR |
CYC | 7 April 1942 |
| Antonio Barrutia |  ESP |
CYC | 13 June 1933 |
| Rabah Bayani |  ALG |
CYC | |
| Pierre Bernet |  FRA |
CYC | 8 April 1939 |
| Eric De Vlaeminck |  BEL |
CYC | 23 March 1945 |
| Gustav Egolf |  SUI |
CYC | 7 August 1932 |
| Peter Frischknecht | SUI |
CYC | 12 March 1946 |
| Domenico Garbelli |  ITA |
CYC | 31 January 1943 |
| Jan Van Geest |  NED |
CYC | |
| Hermann Gretener | SUI |
CYC | 8 September 1942 |
| Klaus Gyger | SUI |
CYC | 15 July 1944 |
| Hubert Harings | NED |
CYC | 31 January 1939 |
| Alfredo Irusta | ESP |
CYC | 14 November 1934 |
| Klaus-Peter Jördens | GER |
CYC | 26 November 1947 |
| Jules Leclercq | FRA |
CYC | 1 September 1939 |
| Renato Longo | ITA |
CYC | 9 August 1937 |
| Luciano Luciani | ITA |
CYC | 17 March 1944 |
| Joseph Mahé | FRA |
CYC | 31 October 1937 |
| José Martínez |  PAN ESP |
CYC | 5 January 1943 |
| Manuel Nava | ESP |
CYC | |
| Dave Nie | GBR |
CYC | 29 December 1940 |
| Freddy Nys | BEL |
CYC | 1 April 1941 |
| Roger Page | GBR |
CYC | 16 April 1937 |
| Michel Pelchat | FRA |
CYC | 11 January 1938 |
| Cor Rutgers | NED |
CYC | 1940 |
| Mane Sadouki | ALG |
CYC | |
| Léon Scheirs | BEL |
CYC | 3 September 1938 |
| Amerigo Severini | ITA |
CYC | 11 May 1931 |
| Karl Stähle | GER |
CYC | 15 July 1944 |
| Mick Stallard | GBR |
CYC | 1944 |
| Cor van Tol | NED |
CYC | |
| Albert Van Damme | BEL |
CYC | 1 December 1940 |
| Rolf Wolfshohl | GER |
CYC | 27 December 1938 |