William Langton FSA (17 April 1803 – 29 September 1881) was an English banker in Manchester, known also for antiquarian and philanthropic interests.

William Currer, vicar of Clapham, and the artist and author Anne Langton was his sister.

[3] The aims of the Manchester and Salford District Provident Society were "for the encouragement of frugality and forethought ...and the occasional relief of sickness and unavoidable misfortune amongst the poor".

[3] To the Manchester Statistical Society Langton contributed in 1857 a paper on the Balance of Account between the Mercantile Public and the Bank of England, and in 1867 a presidential address.

[3] Two of the daughters married sons of Benjamin Heywood;[5] another, Katharine Elizabeth, was the second wife of Joseph Gouge Greenwood.