| Named By: | B. M. Davis in 2007 |
| Time Period: | Unavailable |
| Location: | Across Canada and USA |
| Size: | Unavailable |
| Diet: | Omnivore |
| Fossil(s): | Multiple individuals |
| Classification: | | Chordata | Mammalia | Theria | Metatheria | |
Leptalestes is an extinct genus of mammals in the infraclass Metatheria. It was described by B.M. Davis in 2007. A new species, L. toevsi, was described from the late Cretaceous period of the United States by John P. Hunter, Ronald E. Heinrich, and David B. Weishampel in 2010.