Albionbaatar is an extinct mammal from the Lower Cretaceous of England. It was a member of the also extinct order Multituberculata and shared the world with the much larger dinosaurs. It is in the suborder "Plagiaulacida", family Albionbaataridae. The genus Albionbaatar was named by Kielan-Jaworowska Z. and Ensom P.C. in 1994 based on a single species. The primary species, Albionbaatar denisae, also named by Kielan-Jaworowska and Ensom, was found in Berriasian (Lower Cretaceous) strata of Durlston Bay, in Dorset. It is a miniature multituberculate from the Isle of Purbeck.