Dimorphodon had a large, bulky skull approximately 23 centimetres in length, whose weight was reduced by large openings separated from each other by thin bony partitions.
Dimorphodon je imao veliku, glomaznu lubanju dugu oko 22 cm, čiju su težinu smanjivali veliki otvori međusobno razdijeljeni tankim koštanim pregradama.