Henry Percy, 4th Earl of Northumberland KG (c. 1449 – 28 April 1489) was an English aristocrat during the Wars of the Roses.

He led the rearguard of Richard III's army at the Battle of Bosworth, but failed to commit his troops.

His father was first cousin to (among others) Edward IV of England, Anne, Duchess of Exeter, Edmund, Earl of Rutland, Elizabeth, Duchess of Suffolk, Margaret of York, George, Duke of Clarence, and Richard III of England.

For the following twelve years, Percy held many of the important government posts in northern England, such as warden of the east and middle marches, which were traditional in his family.

Percy was arrested along with Ralph Neville, 3rd Earl of Westmorland and Thomas Howard, 2nd Duke of Norfolk.

[3] Their children included: In April 1489, Percy held temporary residence in his estates of Yorkshire.

Henry VII had recently allied himself to Anne of Brittany against Charles VIII of France.