| Birth Date: | May 2, 1929 |
| Birth Place: | Plain City, Ohio, U.S. |
| Death Date: | September 16, 2010 (aged 81) |
| Death Place: | Arlington, Texas, U.S. |
| Height: | 188 cm |
| Weight: | 99 kg |
| Sport: | Athletics |
| Event: | Discus throw, shot put |
| Pb: | DT – 55.07 m (1954) SP – 16.11 m (1952)[1] |
| Club: | Auburn Tigers |
| Alma Mater: | Auburn University |
| Show-Medals: | yes |
James Leo Dillion (May 2, 1929 – September 16, 2010)[2] was an American discus thrower who won a bronze medal at the 1952 Summer Olympics. Domestically he won the NCAA title in 1952 and the AAU title in 1952.[3]
After retiring from competitions Dillion became an airplane mechanic and private pilot. In his free time he restored planes and cars together with his son Jimmy.[3]