Hao may refer to:Hào, a form of Chinese pseudonymHao (French Polynesia)Hao (city), 鎬, Western Zhou capital, near present-day Xi'an, Shaanxi (China)Hao Mengling, Chinese generalHao Asakura, a character in Shaman King mediaHao Si-wen, a character in the Water Margin universeHsu Hao, a character in Mortal Kombat mediaHAO or High Altitude ObservatoryHA0, a postcode area of the United KingdomHao of Oahu, Prince of OahuRauvolfia sandwicensis, a plant endemic to Hawaii… (More on Hao)