John II, Count of Roucy

John II (died 1251), of the House of Pierrepont, was count of Roucy and lord of Pierrepont, son of Robert of Pierrepont and Eustachie of Roucy. Recognized as heir in 1211, he probably fought at Bouvines in 1214 and stayed loyal to the crown during the barons' revolt against Blanche of Castile.

In 1227 he gained Sissonne from the rebel Enguerrand III of Coucy. He was killed in 1251 fighting for Charles of Anjou in the Flemish succession dispute, leaving a son, John III, by his wife Marie of Dammartin.