Abstract: Altogether 158 species of the hoverflies are listed in this report. It includes species recorded for the Republic of Mordovia for the first time (57 spp.), those repeatedly recorded here (61 spp.), and species which are included based on their previous records (40 spp.). Three species are excluded from the previous faunal list as being based on misidentifications, and one species is considered as doubtfully recorded. Thirteen genera—Baccha Fabricius,Brachyopa Meigen, Eumerus Meigen, Neocnemodon Goffe, Lejota Rondani, Melangyna Verrall, Meligramma Frey, Meliscaeva Frey, Neoascia Williston, Orthonevra Macquart, Parasyrphus Matsumura, Pipizella Rondani, and Scaeva Fabricius—are reported for the fauna of Mordovia for the first time. The species composition and richness of the state protected areas of Mordovia are discussed. The constancy of the presence of the commonest species in the study area is compared. Reference sources of the literature records from Mordovia are provided for each previously recorded species. © 2022, Pleiades Publishing, Ltd.