Helminths of six species are reported from the brown bear, Ursus arctos L., from the Taigonos Peninsula, northeastern Siberia. Trematodes of four species represent new host records: Microphallus pirum (Afanas'ev, 1941); Maritrema afanassjewi Belopol'skaia, 1952; Phocitrema fusiforme Goto and Ozaki, 1930; and Cryptocotyle lingua (Creplin, 1825). Nematodes of two species, Molineus patens (Dujardin, 1845) and Uncinaria yukonensis (Wolfgang, 1956), constitute respectively a new host record and a new record for Eurasia. The parasite–host relationships of these helminths are reviewed.