The data on the black fly fauna of the tribe Simuliini (Diptera: Simuliidae) of the Sakha Republic (Yakutia) comprising available literature, collections of the Zoological Institute RAS, and new material collected in Yakutia were analyzed. Three new species were recorded in the fauna of the Sakha Republic: Archesimulium polare Rubzov, 1940, A. splendidum Rubzov, 1940, and A. tumulosum Rubzov, 1956. Distribution of eleven black fly species was clarified. Processing of the collected material confirmed the presence of 9 black fly species previously known from Yakutia. On the whole, the fauna of the region comprises 27 black fly species.