William Wynne (baptised 1692 – 16 May 1765) was a Welsh lawyer and author.
William Wynne was educated at Jesus College, Oxford, matriculating in 1709, obtaining his BA degree in 1712 and his MA in 1723.
He was assisted in his legal career by family ecclesiastical connections – John Wynne, Bishop of St Asaph from 1715 onwards, was a relative, and his father-in-law was a trusted adviser to successive Bishops of Hereford.
Wynne was one of the lawyers who represented Francis Atterbury, Bishop of Rochester, in his trial in 1723 on charges of high treason.
[1] Wynne's writings included Observations Touching the Dignity and Antiquity of the Degree of Serjeant at Law (1756) (written at a time when the position of the serjeants in the Court of Common Pleas was under threat), and The Life of Sir Leoline Jenkins (1724), using papers inherited from his father.