William Onslow, 4th Earl of Onslow

For other persons named William Onslow, see William Onslow (disambiguation).

William Hillier Onslow, 4th Earl of Onslow, GCMG, PC (7 March 1853–23 October 1911) was a British Conservative politician.

The Earl of Onslow by Leslie Ward, 1883.

Having succeeded as 4th Earl of Onslow in 1870, he held office in the governments of Lord Salisbury and Arthur Balfour, including as a Lord in Waiting from 1886 to 1887. From 1889 until 1892 he served as Governor of New Zealand, and from 1905 to 1911 he was Lord Chairman of Committees (Deputy Speaker) of the House of Lords. He was made a Privy Counsellor on his appointment to the Cabinet post of President of the Board of Agriculture in 1903.

Political offices
Preceded by: The Earl of Dunraven and Mount-Earl	Under-Secretary of State for the Colonies 1887–1888	Succeeded by: Henry de Worms
Preceded by: Henry de Worms	Parliamentary Secretary to the Board of Trade 1888–1889	Succeeded by: The Lord Balfour of Burleigh
Preceded by: Sir William Jervois	Governor of New Zealand 1889–1892	Succeeded by: The Earl of Glasgow
Preceded by: The Lord Reay	Under-Secretary of State for India 1895–1900	Succeeded by: The Earl of Hardwicke
Preceded by: The Earl of Selborne	Under-Secretary of State for the Colonies 1900–1903	Succeeded by: The Duke of Marlborough
Preceded by: Robert Hanbury	President of the Board of Agriculture 1903–1905	Succeeded by: Ailwyn Fellowes
Preceded by: The Earl of Morley	Lord Chairman of Committees of the House of Lords 1905–1911	Succeeded by: The Earl of Donoughmore
Peerage of the United Kingdom
Preceded by: Arthur Onslow	Earl of Onslow 1870–1911	Succeeded by: Richard Onslow