Goyocephale is an extinct genus of pachycephalosaurian ornithischian that lived in Mongolia during the Late Cretaceous about 76 million years ago.

[1] It was first described in 1982 by Altangerel Perle, Teresa Maryańska and Halszka Osmólska for a disarticulated skeleton with most of a skull, part of the forelimb and hindlimb, some of the pelvic girdle, and some vertebrae.

Perle et al. named the remains Goyocephale lattimorei, from the Mongolian гоё (goyo), meaning "decorated", and the Ancient Greek κεφαλή (kephale), for head.

[2] Goyocephale is a primitive pachycephalosaurian, and was originally included in the family Homalocephalidae, which united the genus with Homalocephale, which also has a flat skull roof.

Goyocephale is distinguished from Homalocephale by its overall proportions, the shape of its supratemporal fenestra, and heterodont dentition, although the two share multiple features.

[4] Wannanosaurus yanshiensis Hanssuesia sternbergi Colepiocephale lambei Stegoceras validum Stegoceras novomexicanum Goyocephale lattimorei Homalocephale calathocercos Tylocephale gilmorei Foraminacephale brevis Amtocephale gobiensis Prenocephale prenes Acrotholus audeti Sphaerotholus goodwini Sphaerotholus buchholtzae Alaskacephale gangloffi Pachycephalosaurus wyomingensis Dracorex hogwartsia Stygimoloch spinifer However, one phylogenetic analysis did support a monophyletic Homalocephalidae, with Goyocephale, Homalocephale and Wannanosaurus being the most derived pachycephalosaurians, and their sister taxa being Prenocephale and Tylocephale.