Rhamphocephalus ("beak head") is an extinct genus of fossil reptile from the Middle Jurassic (Bathonian stage) Great Oolite Group of Gloucestershire, England.

Because it is poorly preserved and lacks features that distinguish it from other thalattosuchians, R. prestwichi is considered an invalid species and the genus Rhamphocephalus is a nomen dubium.

[2] The type species, R. prestwichi, is known from the skull roof fragment OUM J.28266, found the Kineton Thorns Quarry, Stow-On-Wold, Gloucestershire.

[1] Although assigned to Pterosauria by previous authors, in their review of pterosaur remains from the Great Oolite group, O'Sullivan and Martill (2018) demonstrated that Rhamphocephalus belongs to Thalattosuchia rather than Pterosauria due to differences with pterosaurs in the cranial bone arrangement.

[2] Pterodactylus bucklandii von Meyer, 1832[3] and Rhamphorhynchus depressirostris Huxley, 1859,[4] both based on jaw material, were previously assigned to Rhamphocephalus, along with the nominal species Pterodactylus aclandi, P. duncani, and P. kiddi, which are based on phalangeal remains.