William Elphinstone (1431 – 25 October 1514) was a Scottish statesman, Bishop of Aberdeen and founder of the University of Aberdeen.
He was born in Glasgow, and educated at the High School of Glasgow and then University of Glasgow, taking the degree of M.A. in 1452. After practising for a short time as a lawyer in the church courts, he was ordained a priest, becoming rector of St. Michael's Church, Trongate, Glasgow, in 1465. Four years later he went to continue his studies at the University of Paris, where he became reader in Canon law, and then, proceeding to Orléans, became lecturer in the university there.
Before 1474 he had returned to Scotland, and was made academic rector of the university, and official of the see of Glasgow. Further promotion followed, but soon more important duties were entrusted to Elphinstone, who was made Bishop of Ross in 1481. He was a member of the Parliament of Scotland, and was sent by James III of Scotland on diplomatic missions to Louis XI of France and Edward IV of England. In 1483 he was appointed Bishop of Aberdeen, although his consecration was delayed for four years; and he was sent on missions to England, both before and after the death of Richard III of England in 1485.