John Dewar, 2nd Baron Forteviot OBE MC TD FRSE DL JP (17 March 1885 – 24 October 1947) was a Scottish businessman and soldier, notable as being head of the whisky giant John Dewar & Sons and of the Distillers Company and a director of the Bank of Scotland.

He was born on 17 March 1885 the eldest child and only son of Sir John Dewar, 1st Baron Forteviot and his wife Johann (Joan) Tod.

[citation needed] From 1922 to 1924 he served as Lord Provost of Perth and was also Deputy Lieutenant of Perthshire.

He also held the title of brigadier in the Royal Company of Archers, the monarch's official bodyguard in Scotland.

When John died, the barony passed to his younger half brother, Henry Dewar.