Dewhirst is a surname, and may refer to:
Charlie Dewhirst (born 1980), British politician Edward Dewhirst (1815–1904), Australian minister and educationist Ian Dewhirst (born 1936), English historian and author Joan Dewhirst (born 1935), British figure skater John Dawson Dewhirst (1952–c.1978), British teacher and yachtsman James Dewhirst (born 1892, date of death unknown), English World War I flying ace Kym Winter-Dewhirst, Australian public servant