| Named By: | Z. Dong in 1978 |
| Time Period: | Late Cretaceous, 69.5 Ma |
| Location: | China, Shandong Province - Wangshi Group |
| Size: | About 60 centimetres long |
| Diet: | Herbivore |
| Fossil(s): | Partial remains |
| Classification: | | Chordata | Reptilia | Dinosauria | Ornithischia | Ceratopsia | |
Micropachycephalosaurus (meaning "small thick-headed lizard") is a monotypic genus of ceratopsian dinosaur. It lived in China during the Late Cretaceous period (between 70.6 and 68.5 million years ago). The incomplete skeleton of the single specimen was found on a cliff southwest of Laiyang, Shandong Province. It was bipedal and herbivorous, and currently has the longest generic name of any dinosaur. Ironically, it was also among the smallest of the dinosaurs, at 1 meter (3.3 feet) long.