All available race results Léon Declercq
| Date | Race | Rank |
| Bruxelles - Luxembourg - Charleroi | ||
| 08/08 | General Classification | 8 |
Rider information for 1937
| Rank | 649 |
| Score | 17 |
| Name | Léon DECLERCQ |
| Country | Belgium |
| Team | Individual |
| Date | Race | Rank |
| Tour de Belgique | ||
| 18/05 | Stage 1 | 84 |
Rider information for 1938
| Rank | 1488 |
| Score | 0 |
| Name | Léon DECLERCQ |
| Country | Belgium |
| Team | Bristol |