Competitors for 1951 World Cyclo-Cross Championships
| Athlete | Country | Sports | Date of birth |
|---|---|---|---|
| Max Breu |  SUI |
CYC | 21 October 1924 |
| Pierre Champion | SUI |
CYC | 1 December 1921 |
| Michel Decroix |  BEL |
CYC | 5 April 1922 |
| André Dufraisse |  FRA |
CYC | 30 June 1926 |
| Roland Fantini | SUI |
CYC | 13 June 1917 |
| Horst Holzmann |  GER |
CYC | 27 April 1930 |
| Roger Jacobs |  LUX |
CYC | 10 May 1923 |
| Pierre Jodet | FRA |
CYC | 8 April 1921 |
| Jean Kirchen | LUX |
CYC | 13 December 1919 |
| Luigi Malabrocca |  ITA |
CYC | 22 June 1920 |
| Albert Meier | SUI |
CYC | 22 August 1927 |
| Angelo Menon | ITA |
CYC | 29 October 1919 |
| Georges Meunier | FRA |
CYC | 9 May 1925 |
| Louis Michiels | BEL |
CYC | 30 November 1919 |
| Graziano Pertusi | ITA |
CYC | 18 May 1933 |
| Richard Popp | GER |
CYC | |
| Franz Reitz | GER |
CYC | 28 January 1929 |
| Roger Rondeaux | FRA |
CYC | 15 April 1920 |
| Pitty Scheer | LUX |
CYC | 7 December 1925 |
| Reinhold Steinhilb | GER |
CYC | 26 February 1926 |
| Marco Thewes | LUX |
CYC | 13 December 1930 |
| Sergio Toigo | ITA |
CYC | 11 June 1924 |
| Firmin Van Kerrebroeck | BEL |
CYC | 14 December 1922 |
| Piet Van Roon |  NED |
CYC | |
| Georges Vandermeisch | BEL |
CYC | 14 December 1918 |
| Gerrit Voorting | NED |
CYC | 18 January 1923 |
| Wouter Wagtmans | NED |
CYC | 10 November 1929 |