Ernest Barnes (disambiguation)

Ernest Barnes (1874–1953) was a British mathematician, scientist, liberal theologian, and bishop.

Ernest Barnes may also refer to:
 * Ernest Barnes (athlete) (1885–1956), British track and field athlete
 * Ernest Barnes (field hockey) (born 1937), New Zealand field hockey player
 * Ernie Barnes (1938–2009), African-American painter and football player
 * Ernest Harlington Barnes (1899–1985), member of the Legislative Council of Bermuda