This work aims to list all known species of terrestrial isopods from Peru until September, 2020. Also, Circoniscus ornatus (Verhoeff, 1941) (Scleropactidae) and Ethelum americanum (Dollfus, 1896) (Eubelidae) are recorded for the first time from Nueva Alianza and Nuevo Sucre, Contamana, Loreto department, Peruvian Amazon rainforest.