The Sterculiaceae are represented in Peru by about 12 genera and 74 species (Brako & Zarucchi, 1993; Ulloa Ulloa et al., 2004), mostly shrubs and trees. Here we recognize 10 endemic species in four genera. Byttneria has the largest number of endemic species. Endemic Sterculiaceae species are found in most regions, mainly Very Humid Montane Forests, Very Humid Premontane Forests, Humid Lowland Amazonian Forests, Desert Shrubland and Mesoandean, between 100 and 2800 m elevation. We applied IUCN categories and criteria to six species. None of the endemic species have been recorded within Peru's protected areas system.