John Mowat may refer to:
John Mowat (college administrator) (1791–1860), Scottish-born politician and college administrator in Ontario, Canada John Mowat (Dean of Brechin), Dean of Brechin, 1947–1953 John Bower Mowat (1825–1900), Presbyterian minister and university professor in Ontario, Canada John McDonald Mowat (1872–1916), lawyer and politician in Ontario, Canada John Stuart Mowat (1923–2001), Scottish QC and Liberal politician