John III of Châteauvillain

John III of Châteauvillain (c. 1310–1355) was lord of Châteauvillain in Champagne, eldest son of John II of Châteauvillain and Marie of Roucy, and spent much of his career in the service of the duke of Burgundy. Left fatherless in 1312, he received guardians named by Philip the Fair in 1313.

In 1326 he granted a charter of liberties to the people of Arc, which Duke Odo IV confirmed two years later, and in 1337 he sold his castle of Brémur to the duke. In 1342 he and his brother Guillaume entered the bishop of Langres's lands in arms, then admitted their fault and won his pardon.

A member of the duke's council, he was one of his eight testamentary executors in 1346. He died in 1355 and was succeeded by his son John IV.