All available race results Jean Ducos
| Date | Race | Rank |
| Tour du Sud-Ouest | ||
| 21/05 | Stage 2 | 5 |
| 30/05 | Stage 8 | 5 |
| 01/06 | General Classification | 20 |
Rider information for 1925
| Rank | 744 |
| Score | 10 |
| Name | Jean DUCOS |
| Country | France |
| Team | Individual |
| Date | Race | Rank |
| Tour du Sud-Ouest | ||
| 18/05 | Stage 5 | 9 |
| 19/05 | Stage 6 | 2 |
| 22/05 | Stage 8 | 10 |
| 24/05 | Stage 9 | 5 |
| 24/05 | General Classification | 13 |
| Circuit du Midi | ||
| 12/07 | Stage 2 | 3 |
| 14/07 | Stage 3 | 7 |
| 14/07 | General Classification | 10 |
Rider information for 1926
| Rank | 282 |
| Score | 78 |
| Name | Jean DUCOS |
| Country | France |
| Team | Individual |
| Date | Race | Rank |
| Circuit du Midi | ||
| 15/07 | Stage 2 | 3 |
| 17/07 | Stage 3 | 4 |
| 17/07 | General Classification | 18 |
Rider information for 1927
| Rank | 473 |
| Score | 41 |
| Name | Jean DUCOS |
| Country | France |
| Team | Individual |
| Date | Race | Rank |
| Circuit du Midi | ||
| 15/07 | Stage 2 | 4 |
| Volta Ciclista a Catalunya | ||
| 08/09 | Stage 1 | 35 |
Rider information for 1928
| Rank | 759 |
| Score | 15 |
| Name | Jean DUCOS |
| Country | France |
| Team | Individual |
| Date | Race | Rank |
| Circuit du Midi | ||
| 25/08 | General Classification | 63 |
| Volta Ciclista a Catalunya | ||
| 08/09 | Stage 1 | 39 |
| 09/09 | Stage 2 | 13 |
| 10/09 | Stage 3 | 89 |
Rider information for 1929
| Rank | 808 |
| Score | 8 |
| Name | Jean DUCOS |
| Country | France |
| Team | Individual |