A survey of fish species was carried out from five stations in Duhok province during the period from August 2016 to September 2017. A total of 517 freshwater fishes, belong to 19 species, namely: Acanthobrama marmid, Arabibarbus grypus, Capoeta damascina, C. trutta, Carasobarbus luteus, Carassius carassius, Chondrostoma regium, Cyprinion kais, C. macrostomum, Cyprinus carpio, Garra rufa, Leuciscus vorax, Luciobarbus barbulus, L. esocinus, L. xanthopterus, Mastacembelus mastacembelus, Mesopotamichthys sharpeyi, Planiliza abu and Silurus triostegus were recorded. The survey showed that the abundant fish at all five stations was C. carassius which is one of the nuisance fish species while the little abundance was recorded for C. luteus.