John Slater may refer to:
Business and government John Slater (industrialist) (1776–1843), (American) father of John Fox Slater, brother and partner of Samuel Slater John Fox Slater (1815–1884), American philanthropist, son of John Slater (industrialist) John Slater (art director) (1877–1914), art director at Doulton's Burslem factory John Slater (New Zealand politician), former President of the New Zealand National Party and current President of Citizens and Ratepayers Now John Slater (British politician) (1889–1935), British Conservative MP for Eastbourne, 1932–1935 John Slater (Canadian politician) (1952–2015), Member of the Legislative Assembly of British Columbia John J. Slater Jr. (1925–1998), American lawyer and politician in Massachusetts John Slater & Co. of Forestdale, Rhode Island
Others John C. Slater (1900–1976), American physicist and theoretical chemist J. D. Slater (born 1954 or 1955), filmmaker and composer John Slater (actor) (1916–1975), British actor specialising in Cockney parts John Slater (cricketer) (1795–?), English cricketer John Slater (figure skater) (1935–1989), British figure skater and ice dancer John Slater, former guitarist with Blaze Bayley John Slater (trade unionist) (1920–1974), British trade union leader John Samuel Slater (1850–1911), British professor of civil engineering