Hao or HAO may refer to: People Hao (surname) (Chinese: ) Hao (video gamer), Chinese professional Dota 2 player Leo Hao, Russian artist Heather O'Reilly, Professional soccer player Places Hao (city), or Haojing (), capital of the Western Zhou, near present-day Xi'an Xi'an, China, derived from the ancient city Hao (French Polynesia), an atoll Hao Airport Hao Prefecture (), of imperial China Hao River, in Thailand Butler County Regional Airport IATA code Other uses Art name (Chinese: , hào) Hakö language, spoken in Papua New Guinea , a fictional character and the main antagonist in the manga and anime Shaman King High Altitude Observatory High Armanen Order Rauvolfia sandwicensis (Hawaiian: ), a flowering plant Hydroxylamine oxidoreductase, an enzyme involved in the nitrogen cycle See also Hau (disambiguation) How (disambiguation) Howe (disambiguation)