John Farmer may refer to: John Farmer (composer) (c. 1570–c. 1601), Renaissance composer of madrigals John Farmer (author) (1789–1838), American historian and genealogist John Farmer (cartographer) (1798–1859), Detroit-based mapmaker John Farmer (1835–1901) (1835–1901), music teacher at Harrow School John Stephen Farmer (1854–1916), lexicographer and spiritualist John Bretland Farmer (1865–1944), botanist John Hind Farmer (1917–2012), SOE Agent, MI6 Agent John Farmer (footballer) (born 1947), English footballer who played for Stoke City John Farmer Jr. (born 1957), Attorney General, acting governor of New Jersey, and law school dean John Q. Farmer (1823–1904), Minnesota politician and jurist