Bagaceratopidae is a family of neoceratopsian dinosaurs. It was named by Alifanov in 2003 but no definition has been proposed. Because of the lack of a definition, Bagaceratopidae was considered inactive by Paul Sereno in 2005. In 2003 Alifanov assigned four genera to Bagaceratopidae: Bagaceratops, Breviceratops, Lamaceratops and Platyceratops; and in a publication from 2008 he also included Magnirostris and the newly described genus Gobiceratops. Alifanov also suggested that Bagaceratopidae, unlike other neoceratopsian families, is of Paleoasiatic origin.