| A (2 species) |
| Acrotholus - Late Cretaceous, 84-83.5 Ma |
| Alaskacephale - Late Campanian, 80-69 Ma |
| B (0 species) |
| C (1 species) |
| Colepiocephale - Late Cretaceous, 80-77.5 Ma |
| D (1 species) |
| Dracorex - Late Cretaceous, 66 Ma |
| E (0 species) |
| F (0 species) |
| G (1 species) |
| Goyocephale - Late Cretaceous, 76 Ma |
| H (1 species) |
| Hanssuesia - Late Cretaceous, 77.5-75 Ma |
| I (0 species) |
| J (0 species) |
| K (0 species) |
| L (0 species) |
| M (0 species) |
| N (0 species) |
| O (0 species) |
| P (2 species) |
| Pachycephalosaurus - Late Cretaceous, 70 Ma |
| Prenocephale - Late Cretaceous, 80-75 Ma |
| Q (0 species) |
| R (0 species) |
| S (2 species) |
| Sphaerotholus - Late Cretaceous, 73 Ma |
| Stygimoloch - Late Maastrichtian, 66 Ma |
| T (2 species) |
| Texacephale - Late Campanian, 77 Ma |
| Tylocephale - Late Campanian, 80-70 Ma |
| U (0 species) |
| V (0 species) |
| W (0 species) |
| X (0 species) |
| Y (0 species) |
| Z (0 species) |