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 manager
Ryuzou Ishino (石野 竜三, born 1962), Japanese voice actor
Ryuzo Morioka (森岡 隆三, born 1975), Japanese footballer
Ryūzō Saki (佐木 隆三, born 1937), Japanese writer
Ryuzo Sasaki (笹木 竜三, born 1956), Japanese politician
Ryūzō Sejima (瀬島 龍三, 1911–2007), Japanese military leader
Ryuzo Shimizu (清水 隆三, 1902–?), Japanese footballer
Torii Ryūzō (鳥居 龍藏, 1870–1953), Japanese anthropologist, ethnologist and folklorist
Ryuzo Yanagimachi (柳町 隆造, 1928–2023), Japanese scientist
