William Stephen, sometimes William Stephani (probably Stephenson), was a medieval prelate based in Scotland, who became Bishop of Orkney and then Bishop of Dunblane. A reader in divinity at the University of St Andrews at its first establishment, he was provided by Avignon Pope Benedict XIII as Bishop of Orkney 15 November 1415. He was a canon of Moray at this date. The consecration took place at the Papal court. He is last attested in 1428, and he died sometime before 25 February 1429. The next bishop of Dunblane was Michael de Ochiltree.