Duriatitan is a genus of titanosauriform sauropod dinosaur that lived in the Late Jurassic in what is now England.

The holotype specimen of Duriatitan, BMNH 44635, is a partial left upper arm bone which was found by R.I. Smith near Sandsfoot, Weymouth in the lower Kimmeridge Clay from Dorset.

The specific name refers to the deltopectoral crest, crista, on the upper arm bone, humerus.

The generic name is derived from the Latin name for Dorset, Duria, and Greek Titan.

[3] Gigantosaurus megalonyx was once synonymised with Duriatitan while D. humerocristatus was still a species of Ornithopsis.