The Gorōyama Kofun (五郎山古墳) is a Kofun period Decorated kofun burial mound, located in the Harada neighborhood of the town of Chikushino, Fukuoka Prefecture, Japan. The tumulus was designated a National Historic Site of Japan in 1949, with the area under protection adjusted in 1984. It is one of the largest circular tombs in Chikushino, dating from the late Kofun period.