Sir William Lynch (c. 1730 – 25 August 1785) was a British diplomat and politician who sat in the House of Commons between 1762 and 1780. Lynch was the eldest son of John Lynch, DD Dean of Canterbury, and his wife Mary Wake, daughter of William Wake, Archbishop of Canterbury. Lynch was elected Member of Parliament for Weobley at a by-election in 1762, and held the seat until 1768. He was then elected MP for Canterbury and held the seat until 1774. He was then returned again as MP for Weobley until he resigned in March 1780. In 1780, he inherited the Manor of Stalisfield, until his death.