Saxatilomys is a genus of murid rodent native to central Laos and Vietnam, containing the sole species Saxatilomys paulinae (commonly known as Pauline's limestone rat). It was first discovered in the Khammouan Limestone National Biodiversity Conservation Area in Khammouan Province, Laos, and also been found in the Vietnamese province of Quang Bình. The genus name is derived from the Latin saxatilis, meaning "among the rocks" and the Greek mys meaning mouse or rat.