Beg (after the Himalayan war deity Beg-tse) is a genus of neoceratopsian dinosaur from the early Cretaceous Period of Mongolia. The genus contains a single species, Beg tse, known from a partial skull and very fragmentary postcrania. Beg represents the most basal neoceratopsian currently known.
Beg is named after Beg-tse, a Himalayan deity who is the god of war in Mongolian culture. The deity is often depicted with a rugose face and/or body, similar to the appearance of the preserved skull of the dinosaur.