Léon Ernest Moreaux (1852–1921) was a French sports shooter and Olympian who competed in pistol and rifle shooting in the late 19th century and early 20th century. Having taken up the sport of shooting earlier in the 19th century, at the age of 38 he prepared himself for competition in the 1900 Olympic Games in Paris, in his home country. He participated in shooting at the 1900 Summer Olympics and won the silver medal in the 25 metre firearm and in the Military Revolver Teams 50m for France and won another silver medal. He also competed in a number of other shooting competitions including the Free Rifle standing and kneeling competitions, where he finished 17th place in each, and in the Free Rifle (prone) competition where he narrowly missed the bronze medal, finishing fourth. He also competed in the Free Pistol event where he finished in 7th place, and in the trap shooting competition where he finished 16th place out of 31.