Rapateaceae comprises approximately 19 genera and 131 species distributed in the Neotropics, with the exception of Maschalocephalus, which is endemic to West Africa. In Brazil, there are nine genera and 38 species. Th e present paper is based on a taxonomic study of the species of Rapateaceae that occur in the state of Pará. Botanical specimens from seven herbaria were analyzed and the occurrence of fi ve genera and eight species was confi rmed for the state. An identifi cation key to the genera and species, descriptions, illustrations and selected specimens are provided.