John Sewell (disambiguation)

John Sewell (born 1940) is a Canadian political activist and writer; mayor of Toronto, 1978–1980.

John Sewell may also refer to:
 * John Sewell (athlete) (1882–1947), Scottish tug of war competitor
 * John Sewell (Miami) (1867–1938), third Mayor of Miami, Florida
 * John Sewell (footballer) (born 1936), English footballer who played during the 1970s
 * John Sewell (cricketer) (1844–1897), English cricketer
 * John Sewell (publisher) (1735–1802), English bookseller, printer, and publisher of European Magazine
 * Jackie Sewell (1927–2016), English footballer
 * Jack Sewell (rugby league) (1926–1955), rugby league footballer of the 1940s and 1950s