Katsuyama Domain (越前勝山藩, Katsuyama-han) was a feudal domain under the Tokugawa shogunate of Edo period Japan. It was based at Katsuyama Castle in eastern Echizen Province in what is now the city of Katsuyama in Fukui Prefecture. It was ruled during most if its history by a cadet branch of the Ogasawara clan.