John Dewar
John Dewar may refer to:
- Dewar's Scotch Whisky, made by John Dewar & Sons
- John Dewar , Vice-Chancellor of La Trobe University
- John Dewar Sr., founder of John Dewar & Sons
- John Dewar, 1st Baron Forteviot, son of John Dewar, Sr.
- John Dewar, 2nd Baron Forteviot, Scottish businessman and soldier
- John Dewar , World War II Royal Air Force fighter pilot
- John A. Dewar, farmer and political figure on Prince Edward Island
- John Michael Dewar, British gynaecologist and ornithologist
- John Dewar , British politician