Kōriyama Castle (郡山城, Kōriyama-jō) was a Japanese castle in what is now the city of Yamatokōriyama, Nara Prefecture, Japan. The Sengoku daimyo Tsutsui Junkei started construction of the castle, and Toyotomi Hidenaga made it his residence. In the Edo period, it became the headquarters of the Kōriyama Domain.