Ryūzō, Ryuzo or Ryuuzou (written: 隆三, 隆造, 龍三, 龍藏 or 竜三) is a masculine Japanese given name. Notable people with the name include:
Ryuzo Hiraki (平木 隆三, 1931–2009), Japanese footballer and managerRyuzou Ishino (石野 竜三, born 1962), Japanese voice actorRyuzo Morioka (森岡 隆三, born 1975), Japanese footballerRyūzō Saki (佐木 隆三, born 1937), Japanese writerRyuzo Sasaki (笹木 竜三, born 1956), Japanese politicianRyūzō Sejima (瀬島 龍三, 1911–2007), Japanese military leaderRyuzo Shimizu, Japanese footballerTorii Ryūzō (鳥居 龍藏, 1870–1953), Japanese anthropologist, ethnologist and folkloristRyuzo Yanagimachi (柳町 隆造, born 1928), Japanese scientist