William Salt FSA MRSL (29 October 1808 – 6 December 1863)^[2] was a British banker in London, England, and a genealogist and antiquary in whose memory the William Salt Library in Stafford was founded.

Salt's father, John Stevenson Salt (High Sheriff of Staffordshire in 1838), married Sarah Stevenson, the granddaughter of John Stevenson, founder in 1737 of a banking company in Stafford. The firm, Stevenson Salt & Co, had opened in Cheapside, London, in 1788 and in 1867 merged with Bosanquet & Co and later with Lloyds Banking Company.

His nephew was Sir Thomas Salt Bt. of Standon, near Eccleshall, Staffordshire.

Salt was an avid collector of topographical and genealogical books and records, particularly those relating to Staffordshire. After his death his extensive collection was catalogued and donated to the County of Stafford, which financed the opening in 1872 of the William Salt Library in Market Square, Stafford.

He was also commemorated in the name of the William Salt Archaeological Society, founded in 1879 as a text publication society to publish local and national documents relating to the history of Staffordshire. The society changed its name in 1936 to the Staffordshire Record Society.

He died on the 6th December 1863 and is buried in Highgate Cemetery.^[3]

• Johnson, D. A. (2004). "Salt, William (1808–1863)". Oxford Dictionary of National Biography (online ed.). Oxford University Press. doi:10.1093/ref:odnb/24566. (Subscription or UK public library membership required.)
• Knight, Randle W. (2002). William Salt and His Library. Occasional Papers. Vol. 3. Staffordshire: Staffordshire Record Society.

Wikisource has the text of the 1885–1900 Dictionary of National Biography's article about Salt, William.

• About William Salt; Staffordshire County Council