Georges Lucien Démanet (1874–1943) was a French gymnast who competed at the turn of the 20th century. He participated in Gymnastics at the 1900 Summer Olympics in Paris and won the bronze medal with a total score of 293 points in the only gymnastic event to take place at the games, the combined exercises. Gustave Sandras won gold with a score of 302 points and Noel Bas won silver.