Eighteen species of Coleoptera were determined as the most frequently recorded beetles in different bibliographic references and entomological collections. The distribution of forensically important beetle species in Peru was obtained from reviewing of biodiversity surveys, forensic entomological succession studies and systematic revisions, as well as specimen examination in six Peruvian entomological collections. Peruvian distribution at region, province, and ecological region level are provided for the eighteen species belonging to Cleridae (Necrobia Olivier, 1795), Dermestidae (Dermestes Linnaeus, 1758), Histeridae (Euspilotus Lewis, 1907, Saprinus Erichson, 1834, Xerosaprinus Wenzel, 1962), Staphylinidae (Creophilus Leach, 1819, Oxelytrum Gistel, 1848), and Trogidae (Omorgus Erichson, 1847, Polynoncus Burmeister, 1876) families. These species can be considered priorities for future forensic studies in Peru.