| Jack Cretney | |
| Fullname: | John Thomas Cretney |
| Birth Date: | 1879 |
| Birth Place: | Harrington, England |
| Death Place: | Alabama, United States |
| Position: | Wing half |
| Years1: | 1904–1905 |
| Caps1: | 0 |
| Goals1: | 0 |
| Years2: | 1905–1911 |
| Caps2: | 167 |
| Goals2: | 7 |
| Years3: | 1911–1912 |
| Caps3: | 5 |
| Goals3: | 0 |
| Totalcaps: | 172 |
| Totalgoals: | 7 |
John Thomas Cretney (1879 – 1956) was an English professional footballer who played as a wing half.