Mao could refer to:

• Mao Zedong, (Mao Tse-Tung in Wade-Giles), aka Chairman Mao leader of the Communist Party of China from 1935 to 1976.
• Maoism, an ideology derived from Mao Zedong's teachings
• The Unknown Story, a biography of Mao Zedong by Jung Chang and Jon Halliday published in 2005
• MAΘ, Mu Alpha Theta National Mathematics Honor Society
• Mao (game), a card game
• Mao (god), the Lunar deity of Persian mythology
• Mao (bird), a bird. (Gymnomyza samoensis)
• monoamine oxidase
• methylaluminoxane
• Mao is the name of Madoka and Arisu Fujisaki's angel in the anime and manga series Angelic Layer
• Mao is the name of an Irish chain of Asian fusion restaurants and cafés with one restaurant in Glasgow and three in Dublin, including the Dundrum Town Centre
• mao is the author of the Microsoft Windows password recovery suite, Cain & Abel
• Mao is the name of some cities:
  • Mao, Chad
  • Mao, Dominican Republic
  • Maó (Minorque)

Mao | Mao | Mao