John Valcoulon Le Moyne (November 17, 1828 – July 27, 1918) was a U.S. Representative from Illinois.

Le Moyne was born in Washington, Pennsylvania, the son of Madeleine Romaine (Bureau) and Francis Julius LeMoyne.

He was an unsuccessful candidate of the Liberal Party for election in 1872 to the Forty-third Congress.

He successfully contested as a Democrat the election of Charles B. Farwell to the Forty-fourth Congress and served from May 6, 1876, to March 3, 1877.

[1] This article incorporates public domain material from the Biographical Directory of the United States Congress