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The taxonomic treatment of the species of Melastomataceae occurring in the Parque Estadual de Utinga, Pará, is presented. Twenty-seven species distributed in 13 genera were recorded, with five new records for the study area: Leandra micropetala, M. affinis, M. argyrophylla, M. punctata, and Pterolepis glomerata; the latter is also a new record for the state of Pará. Miconia was the largest genus with 9 species, followed by Clidemia (four species), Aciotis (three species), and Tococa (two species). The remaining genera were all represented by a single species (Adelobotrys, Bellucia, Henriettea, Leandra, Maieta, Mouriri, Nepsera, Pterolepis, and Tibouchina). Identification keys, morphological descriptions, information on phenology, habitat, geographical distribution, taxonomic comments, and illustrations of the species are provided. The Melastomataceae figure among the largest plant families in the area of the state capital, Belém, the data presented herein may be useful for habitat restoration.