Catopsbaatar is an extinct genus of mammal that lived in Mongolia during the Upper Cretaceous Period. It coexisted with some of the late dinosaurs. This animal was a member of the extinct order Multituberculata within the Suborder Cimolodonta and family Djadochtatheriidae. The genus Catopsbaatar was named by Zofia Kielan-Jaworowska in 1974 and 1994 based on a single species.