This research was carried out in the lake Sipogas Rokan Hulu Regency Riau Province from May to July 2016. The aims of this research to determine species of fish found in the lake Sipogas Rokan Hulu.The method of direct observation ( inventory survey) the determination of sampling stations with purposive sampling. Determination station based on the environmental conditions of the lake Sipogas Rokan Hulu Regency consists of 4 research stations. The research found to 353 individuals of 3 ordo, 7 families, 13 genus and 14 species. Species found was Anabas testudineus, Barbodes gonionotus, Belontia hasselti, Channa striata, Cyclocheilichthys apogon, Hampala macrolepidota, Helostoma temminckii, Kryptopterus limpok, Ompok eugeneiatus, Osteochilus hasseltii, Osteochilus mycrocephalus, Pristolepis grooti, Puntius lateristriga and Rasbora sp.