Hilduin II (d. after 993), Count of Arcis-sur-Aube, Seigneur de Ramerupt, was the nephew or son of Hilduin I, Count of Montdidier. His mother was Hersende, a noble lady who was either Hilduin I's wife or sister or the spouse of Hilduin I's unnamed brother. Hilduin II was a member of the House of Montdidier.
Virtually nothing is known about Hilduin II other than an obscure reference in the Chronicle of Alberic de Trois-Fontaines. He reportedly made a pilgrimage to Jerusalem in 992 during a rare time of peace there following the death of conquering general Jawhar al-Siqilli.
He apparently married, but the name of his wife is unknown. He and his wife had two children:
His son Hilduin III inherited the title of Seigneur de Ramerupt, but no other Counts of Arcis-sur-Aube are recorded.