Toriumi is a Japanese surname. Notable people with the surname include:
Akira Toriumi, Japanese engineer Hisayuki Toriumi (1941–2009), Japanese filmmaker Jinzō Toriumi (1929–2008), Japanese screenwriter Katsumi Toriumi, Japanese voice actor Kohsuke Toriumi, Japanese voice actor
Fictional characters Isako Toriumi, a supporting character and Social Link in Persona 3