William Beamont (1797–1889) was a Victorian solicitor and local philanthropist, living in the town of Warrington, in the north-west of England.
He was the first mayor of Warrington after its incorporation as a municipal borough in 1847. As mayor, he founded its municipal library, the first rate-aided library in the UK, in 1848. He travelled extensively, including in the Holy Land, where he met William Holman Hunt. His diaries, stored in the town's main library, are a valuable source of social history. For many years he lived at Orford Hall.