Shizuo (written: 静夫, 静雄, 静男, 倭夫 or 鎮雄) is a masculine Japanese given name. Notable people with the name include:

• Shizuo Akira (審良 静男, born 1953), Japanese immunologist
• Amanoyama Shizuo (天ノ山 静雄, 1953–1997), Japanese sumo wrestler
• Shizuo Fujieda (藤枝 静男, 1907–1993), Japanese writer
• Fujimori Shizuo (藤森 静雄, 1891–1943), Japanese printmaker
• Shizuo Imaizumi (今泉 鎮雄, born 1938), Japanese aikidoka
• Shizuo Kakutani (角谷 静夫, 1911–2004), Japanese-born American mathematician
• Shizuo Miyama (深山 静夫), Japanese footballer
• Shizuo Mochizuki (望月 倭夫, 1909–?), Japanese pole vaulter
• Nayoroiwa Shizuo (名寄岩 静男, 1914–1971), Japanese sumo wrestler
• Shizuo Takada (高田 静夫, born 1947), Japanese footballer and referee
• Shizuo Takada (athlete) (高田 静雄, 1909–1963), Japanese shot putter
• Shizuo Yada (矢田 静雄, born 1948), Japanese sport wrestler
• Shizuo Yokoyama (横山 静雄, 1890–1961), Japanese general