Belasyse is a surname, and may refer to:
Sir Henry Belasyse, 1st Baronet (1555–1624), English politician Henry Belasyse (1604–1647), English politician Henry Belasyse (died 1667) (c.1639–1667), English politician Henry Belasyse (died 1717) (1648–1717), English soldier and politician Henry Belasyse, 2nd Earl Fauconberg (1742–1802), British politician and peer John Belasyse, 1st Baron Belasyse (1614–1689), English Royalist officer and Member of Parliament Thomas Belasyse, 1st Earl Fauconberg (c.1627–1700), English peer, Parliamentarian of the English Civil War
See also Bellasis