William Haydon (1846-4 November 1922) was a company director and local politician.

Born in Brixton, he was the son of William Haydon, a butcher, and William junior originally took up this occupation.

A resident of Herne Hill, he sat as a Moderate Party member of the London County Council representing Lambeth, Brixton from 1895-1901. He did not contest the 1901 election but attempted to regain the seat but was defeated in 1904. By 1907 the Moderates had been reorganised as the Municipal Reform Party and he regained the Brixton seat. He stood down at the 1919 council election.

He died in 1922 and was buried at Norwood Cemetery.