John C. White may refer to: John Campbell White (disambiguation) John Campbell White, 1st Baron Overtoun (1843–1908), Scottish chemicals manufacturer John Campbell White (Irish politician) (died 1923), High Sheriff of Belfast and Lord Mayor of Belfast John Campbell White (diplomat) (1884–1967), American diplomat, US ambassador to Haiti and Peru John Coyle White (1924–1995), American politician from Texas John White (Louisiana politician) (born 1975), American politician from Louisiana