| Roles | Competed in Olympic Games |
|---|---|
| Sex | Male |
| Full name | Léonard Jules "Léon"•Mascaux |
| Used name | Léon•Mascaux |
| Born | 19 January 1900 in Saint-Amand-les-Eaux, Nord (FRA) |
| Died | 25 June 1965 in Nivelle, Nord (FRA) |
| Measurements | 169 cm |
| Affiliations | Olympique Lillois, Lille (FRA) |
| NOC | France |
Personal Bests: 3000 – unknown; 5000 – 15:26.4e (1924).
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 1924 Summer Olympics | Athletics | FRA |
Léon Mascaux | |||
| 5,000 metres, Men (Olympic) | 9 | |||||
| 3,000 metres, Team, Men (Olympic) | France | 4 |