Sir William D'Oyly, 1st Baronet

Sir William D'Oyly, 1st Baronet ( 1614 – November 1677) was an English politician who sat in the House of Commons variously between 1654 and 1677.

Biography D'Oyly was the son of William D'Oyly. He succeeded to the estates of his uncle Henry, and was known as Sir William, the elder. As heir to Susan D'Oyly, his cousin, he came into possession of Pond-hall (Hadleigh), Topsfield, and Cossford, in Suffolk, and Shottisham (now more generally spelled Shotesham), Gostlings, and three manors in Warham, in Norfolk. He was serving abroad in the army of Gustavus Adolphus of Sweden, and remained abroad after Gustavus Adolphus's death until he returned to take possession of the family fortune. He was knighted by King Charles I in 1642, for his gallant behaviour.

At the end of the First English Civil War in 1646 D'Oyly was commanding a regiment of the Norfolk Trained Bands, though he was excluded at the time of Pride's Purge. In 1654, he was elected Member of Parliament for Norfolk in the First Protectorate Parliament. He was re-elected MP for Norfolk in 1656 for the Second Protectorate Parliament and in 1659 for the Third Protectorate Parliament.

In 1660, D'Oyly was elected Member of Parliament for Great Yarmouth in the Convention Parliament,