William Hillier Onslow, 4th Earl of Onslow,, was a British Conservative politician. He held several governmental positions between 1880 and 1905 and was also Governor of New Zealand between 1889 and 1892.

Richard William Alan Onslow, 5th Earl of Onslow, styled Viscount Cranley until 1911, was a British peer, diplomat, parliamentary secretary and government minister.