John Barnett (1802–1890) was an English composer. John Barnett may also refer to: John Barnett (Australian rules footballer) (born 1975), former Australian rules footballer John Barnett (rugby) (1880–1918), Australian rugby union and rugby league player John Francis Barnett (1837–1916), English music composer and teacher John Davis Barnett (1848–1926), early Canadian curator-librarian Jack Barnett (baseball) (1879–1923), baseball player John Maughan Barnett (1867–1938), New Zealand organist, choirmaster and conductor John W. Barnett (1800–1876), Texas farmer, merchant and community leader John Manley Barnett (1917–2013), American conductor See also John Barnet (died 1373), English bishop