John Barnes may refer to:
SportsmenJohn Barnes (Australian rules footballer) (born 1969), Australian rules footballerJohn Barnes (baseball) (born 1976), former Major League Baseball playerJohn Barnes (cricketer) (1916–1943), Irish cricketerJohn Barnes (footballer) (born 1963), Jamaican-born England footballerJohn Barnes (manager) (1855–1929), Minor League Baseball manager
Politicians and juristsJohn Barnes (MP for Wigan), in 1554, MP for WiganJohn Barnes (Australian politician) (1868–1938), Australian politicianJohn Barnes, Jr. (born 1931), American politician, member of the New Hampshire SenateJohn Barnes (British Army officer) (1746–1810), British Army officer and Canadian politicianJohn Barnes (judge) (1859–1919), Justice of the Wisconsin Supreme CourtJohn Barnes (mayor), Mayor of Dunedin, New ZealandGorell Barnes, 1st Baron Gorell (John Gorell Barnes, 1848–1913), British lawyer and judgeJohn Peter Barnes (1881–1959), U.S. federal judgeJohn E. Barnes, Jr. (born 1958), member of the Ohio House of RepresentativesJohn Patrick Barnes (1941–2011), city councilman in Columbia, MissouriJohn Francis Barnes (1904–1952), Australian politicianJohn R. Barnes (1833–?), member of the Utah State Senate
WritersJohn Barnes (author) (born 1957), science fiction authorJohn Barnes (English broadcaster) (born 1961), English radio broadcaster and journalist for the BBC
OthersJohn Barnes (monk) (died 1661), Benedictine monkJohn Andrew Barnes, III (1945–1967), U.S. Army Medal of Honor recipientJohn Barnes (computer scientist), programming language designerJohn Barnes (historian), British historianJohn Barnes (musician) (born 1932), jazz saxophonist and clarinetistJohn Barnes, 5th Baron Gorell (born 1959), British chartered surveyorJohn Arundel Barnes (1918–2010), Australian and British social anthropologistJohn Sanford Barnes (1836–1911), United States Navy officerJ. Mahlon Barnes (1866–1934), American trade union functionary and socialist political activistJohn Barnes (actor) (1761–1841), American stage actor, father of Charlotte Mary Sanford Barnes
John Barnes (born 1962), marketing professional, philanthropist, Autism advocate.