| Jack Strong | |
| Fullname: | John Service Strong |
| Birth Date: | 18 April 1884 |
| Birth Place: | Helensburgh, Scotland |
| Death Place: | Bellevue Hill, New South Wales |
| Originalteam: | Melbourne Grammar/Brunswick |
| Position: | Ruck/Forward |
| Guernsey: | 0 |
| Statsend: | 1912 |
| Years1: | 1901, 1903–10, 1912 |
| Games Goals1: | 78 (29) |
John Service Strong (18 April 1884 – 15 March 1971) was an Australian rules footballer who played with Melbourne in the Victorian Football League (VFL).[1]
Born in Scotland, Strong commenced his football career while captain of Melbourne Grammar School. He later had a prominent business career, holding positions including Chief Assistant in the Trade Commissioner Service and Australian representative of the Society of Motor Manufacturers and Traders.[2]