Mao Zedong, also known as "Chairman Mao," leader of the Communist Party of China from 1935 to 1976

Madame Mao (Jiang Qing), the fourth wife of Mao Zedong and a leading politician in the Cultural Revolution

Mao, a card game

Mao: The Unknown Story, a biography of Mao Zedong by Jung Chang and Jon Halliday

Mao, the name of a Geass-user in the anime series Code Geass: Lelouch of the Rebellion.

Maoism, an ideology derived from Mao Zedong's teachings

Mao, the name of Madoka and Arisu Fujisaki's angel in the anime and manga series Angelic Layer

Mu Alpha Theta or MAΘ, Mu Alpha Theta National Mathematics Honor Society

Mao Asada

monoamine oxidase, singular abbreviation MAO

Mao Tse Tongue, a level in the video game Gex: Enter the Gecko

Mah or Mao, Zoroastrianism's divinity of the moon

Maó (Mahon), a city on the island of Minorca, Spain

"Micro Arc Oxidation" or MAO, also known as Plasma electrolytic oxidation

methylaluminoxane, commonly called MAO

Mao Anying, the son of Mao Zedong

Mao, a character in the film Marock, played by Assaâd Bouab

Mao, a municipality in the Dominican Republic

the IATA code for Eduardo Gomes International Airport in Manaus, Brazil

the Molėtai Astronomical Observatory

Mao, a bird

Ma‘o, Hawaiian name for a species of cotton

Mao, a city in Chad

Daichi Mao

Mao Zehong, the sister of Mao Zedong

Mao Zemin and Mao Zetan, the brothers of Mao Zedong