Denner is a surname. Notable people with the surname include:
Balthasar Denner (1685–1749), German painterCharles Denner, French actorJacob Denner, woodwind instrument maker, son of Johann Christoph DennerJohann Christoph Denner, (1655-1707), famous woodwind instrument makerMichael Denner, Danish heavy metal guitaristPat Denner, American neon sign designer