| William Percy | |
| Bishop of Carlisle | |
| Religion: | Catholic |
| Appointed: | 30 August 1452 |
| Term End: | 26 April 1462 |
| Predecessor: | Nicholas Close |
| Successor: | John Kingscote |
| Consecration: | between 16 November and 18 December 1452 |
| Birth Date: | 7 April 1428 |
| Death Date: | 26 April 1462 |
William Percy (7 April 1428 at Alnwick Castle – 26 April 1462) was a late medieval Bishop of Carlisle. He was the fifth son of Henry Percy, 2nd Earl of Northumberland, and his wife Lady Eleanor Neville. Percy was in 1451 appointed to be Chancellor of the University of Cambridge, a post he held until 1456. He was selected 30 August 1452 to be Bishop of Carlisle following the appointment of his predecessor Nicholas Close to the Bishopric of Coventry and Lichfield. Percy was consecrated between 16 November and 18 December 1452. He died on 26 April 1462.[1]