John Barber
John Barber may refer to:
- John Barber (clergyman) (died 1549)
- John Roaf Barber (1841–1917), Canadian industrialist and politician
- John Barber (racing driver) (born 1929), retired British Formula One driver
- John Barber (basketball) (born 1927), retired American basketball player
- Bill Barber (musician) (John William Barber, 1920–2007), tuba player
- John Barber (engineer) (1734–1801), inventor of the gas turbine in 1791
- John Barber (cricketer) (1849–1908), English cricketer
- John Warner Barber (1798–1885), American artist and author of popular histories
- John P. Barber pioneer of railgun technology
- Skip Barber (born 1936 as John Barber III), retired American racecar driver
- John Barber, Lord Mayor of London, 1732
- John Barber, represented Tryon County in the North Carolina General Assembly of 1777