William Graham Nicholson, PC, JP (11 March 1862 – 29 July 1942) was a British Liberal Unionist and later Conservative Party politician. Nicholson was born into a famous family of distillers, the son of William Nicholson and brother of John Sanctuary Nicholson, a notable military figure in Imperial Africa. He grew up in Basing Park at Froxfield, which later became his seat. He was educated at Harrow School and at Trinity College, Cambridge. Nicholson served as Director-General on Mobilisation in the Second Anglo-Boer War from 30 June 1901 and was promoted an Honorary Colonel commanding the 3rd Battalion of the Hampshire Regiment. In 1890 he married Alice Margaret Beach, daughter of Rt Hon. William Wither Bramston Beach MP.