| Gary George Lash | |
| Nationality: | American |
| Field: | Geoscience |
| Alma Mater: | Kutztown University Lehigh University (MS and PhD) |
| Known For: | Marcellus Shale calculations |
| Prizes: | FP Top 100 Global Thinkers John T. Galey Memorial Award |
| Spouse: | Eileen Lash |
Gary Lash is an American geologist and member of AAPG. He was a professor emeritus at SUNY Fredonia and former adjunct professor at the University at Buffalo. He nominated by Foreign Policy for 2011 FP Top 100 Global Thinkers with Dr. Terry Engelder. In 2019, Dr. Lash received the John T. Galey Memorial Award from the American Association of Petroleum Geologists.