William Sandys (c. 1607 – December 1669), known as Waterworks Sandys, was an English politician. He was MP for Evesham in three Parliaments from 1640 until 1669. During the English Civil War he lived as an exile in France, procuring arms for the Royalist cause. He was a notable waterworks engineer, who improved the River Avon and the River Wye, and who was involved in various ways in several other river navigation schemes.