Léon Ernest Moreaux (10 March 1852 in Féron – 11 November 1921 in Rennes) was a French sports shooter and Olympian who competed in pistol and rifle shooting in the late 19th century and early 20th century.

[1][2] 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, which were held 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.

Moreaux entered the 1908 Olympic Games at the age of 46 and competed in the Free Team Rifle competition for France, but narrowly missed bronze, finishing in fourth position.

At this point in his career, only four years away from age 50, he only competed in two other events – in the Free Pistol, finishing 17th, and in the Free Rifle Combined event, where he finished in 39th place.