| Fullname: | Georges Robert Félix Constant Leuillieux |
| Birth Date: | 3 August 1879 |
| Birth Place: | Lille, France |
| Death Place: | Eu, France |
| Sport: | Swimming, water polo |
| Club: | Pupilles de Neptune de Lille |
| Show-Medals: | yes |
Georges Robert Félix Constant Leuillieux (3 August 1879 – 1 May 1950) was a French freestyle swimmer and water polo player. He competed at the 1900 Summer Olympics in water polo and four swimming events. He won a bronze medal in the 200 m team swimming and finished sixth in the 1000 m freestyle events.[1]