John C. Watson may refer to:
John C. Watson (admiral) (1842–1923), admiral of the United States Navy John C. Watson (judge) (1878–1970), justice of the New Mexico Supreme Court
See also Sir John Watson (advocate) (John Charles Watson, 1883–1944), Scottish advocate and sheriff, Solicitor General for Scotland 1929–31 Chris Watson (John Christian Watson, 1867–1941), Australia's third prime minister John William Clark Watson (1808–1890), Confederate politician and judge