| Gary Tobian | |
| Birth Place: | Detroit, Michigan, U.S. |
| Headercolor: | lightsteelblue |
| Sport: | Diving |
| Club: | LAAC, Los Angeles |
| Height: | 183 cm |
| Weight: | 73 kg |
| Show-Medals: | yes |
Gary Milburn Tobian (born August 14, 1935) is a retired American diver. He competed in the 1956 and 1960 Summer Olympics and won a gold or silver medal in all his events: a gold in the 3 m springboard in 1960 and two silvers in the 10 m platform. Tobian held six Association of American Universities (AAU) titles in the platform, and won the springboard at the 1958 AAU Championships and at the 1959 Pan American Games. In 1978 he was inducted into the International Swimming Hall of Fame.
Tobian was a successful businessman. He was married to the Olympic swimmer Marley Shriver, but they later divorced.