Abstract Morelos is the second smallest state in Mexico, nevertheless, it possesses a remarkable diversity of habitats and insects. Contrastingly, very little is known about some taxa like Blattodea. Here we present new data and taxonomic arrangements for some Blaberoidea of the state and a checklist of cockroaches from Morelos. New material was sampled from Reserva de la Bisfera Sierra de Huautla, near the village El Limon and an urban site in Cuernavaca, Loma Bonita colony. We report 13 genera and 15 species for Morelos state. Panchlora acolhua, Caloblatta sp. and Ischnoptera rufa occidentalis are new state records. Holotypes of Cahita nahua and C. yaqui are illustrated for the first time, and a new species is described for Cuernavaca, Morelos. Total number of reported localities are scarce (18), with many municipalities poorly or not studied. Morelos shows an interesting potential richness according to the state area. In this work, with only a few samples from two localities, important information has been generated. With more studies and efforts, the number of species should increase, including new species.