| Named By: | James Kirkland in 1998 |
| Time Period: | Early Cretaceous, 126 Ma |
| Location: | USA, Utah - Cedar Mountain Formation |
| Size: | 5 meters long |
| Diet: | unavailable |
| Fossil(s): | Almost complete skeleton and skulls |
| Classification: | | Chordata | Reptilia | Dinosauria | Ornithischia | Thyreophora | Ankylosauria | Ankylosauridae | Polacanthinae | |
Gastonia is a genus of herbivorous ankylosaurian dinosaur from the Early Cretaceous of North America, around 125 million years ago. It is often considered a nodosaurid closely related to Polacanthus. Gastonia has a sacral shield and large shoulder spikes.