During the study of materials from Vietnam collected in 2011–2019 and stored in the herbarium of the Komarov Botanical Institute of the Russian Academy of Sciences (LE) we identified specimens of 15 species and four varieties of myxomycetes, which have not been previously reported for the country. Among them, Licea verrucispora, Paradiacheopsis fimbriata, Perichaena areolata, P. luteola, Physarum dictyosporum, Reticularia splendens, Stemonaria gracilis are reported for the first time in Southeast Asia. The data on their localities, habitats, substrate, and distribution are provided.