John I, Viscount of Rochechouart

John I, Viscount of Rochechouart (died 19 September 1356), was a Limousin nobleman who held the castle of Rochechouart and the lordship of Tonnay-Charente. On 11 April 1336 he married Jeanne de Sully, daughter of Henry IV de Sully, grand butler and grand treasurer of France.

She brought him the lordships of Corbigny and Brion. He died at Poitiers on 19 September 1356. His grandson John II later held the viscounty.