| Jack McJennett | |
| Fullname: | John James McJennett |
| Birth Date: | 1906 |
| Birth Place: | Cardiff, Wales |
| Position: | Full back |
| Years1: | 1929–1932 |
| Clubs1: | Cardiff City |
| Caps1: | 5 |
| Goals1: | 0 |
| Years2: | 1932–1933 |
| Clubs2: | Exeter City |
| Caps2: | 0 |
| Goals2: | 0 |
John James McJennett (1906 – after 1933) was a Welsh professional footballer who played as a full back. He made five appearances in the Football League for Cardiff City.[1]