| Named By: | T. Smith & R. Smith in 2010 |
| Time Period: | Early Eocene |
| Location: | Belgium -Tienen Formation. USA, Wyoming - Willwood Formation |
| Size: | Unavailable |
| Diet: | Carnivore |
| Fossil(s): | Partial remains of several individuals |
| Classification: | | Chordata | Mammalia | Carnivora | Miacidae | |
| Also known as: | | Miacis rosei | Miacis winkleri | |
Gracilocyon is an extinct genus of miacid carnivoran which existed in United States, in Belgium and in the United Kingdom during the earliest Eocene. It was first named by Thierry Smith and Richard Smith in 2010 and the type species is Gracilocyon winkleri.