| Jack Dewar | |
| Fullname: | John Keddie Dewar |
| Birth Date: | 1923 12, df=y |
| Birth Place: | Buckhaven, Scotland |
| Death Place: | Crook of Devon, Scotland |
| Position: | Left winger |
| Youthclubs1: | Bayview YC |
| Years1: | 1946–1947 |
| Years2: | 1947–1951 |
| Years3: | 1951–1952 |
| Clubs1: | Heart of Midlothian |
| Clubs2: | Dundee United |
| Clubs3: | Forfar Athletic |
| Caps1: | 3 |
| Goals1: | 3 |
| Caps2: | 47 |
| Goals2: | 9 |
| Caps3: | 0 |
| Goals3: | 0 |
John Keddie Dewar (14 December 1923 – 19 October 2011) was a Scottish footballer who played as a left winger. Dewar began his footballing career shortly after the Second World War with Heart of Midlothian, scoring three goals in as many appearances before moving to Dundee United in 1947. After four years at Tannadice, Dewar moved to Forfar Athletic, where he failed to make an appearance. Dewar left part-time professional football in 1952 to take up a full-time career as a mining surveyor and planner with the National Coal Board.