John Dewar may refer to: Dewar's Scotch Whisky, made by John Dewar & Sons John Dewar (academic) (born 1959), Vice-Chancellor of La Trobe University John Dewar Sr. (1805–1880), founder of John Dewar & Sons John Dewar, 1st Baron Forteviot (1856–1929), son of John Dewar, Sr. John Dewar, 2nd Baron Forteviot (1885–1947), Scottish businessman and soldier John Dewar (RAF officer) (1907–1940), World War II Royal Air Force fighter pilot John A. Dewar (1863–1945), farmer and political figure on Prince Edward Island John Michael Dewar (1883–1941), British gynaecologist and ornithologist John Dewar (MP) (1740s–1795), British politician