Wao

Wao or WAO may refer to:

Places

 * Wao, Lanao del Sur, a municipality in the Philippines
 * Wao State, a former princely state in Banas Katha, Gujarat, India

Other uses

 * Wao language, a language isolate of the Amazon rainforest
 * Wappo language, an extinct language of North America
 * West Australian Opera
 * Wet air oxidation
 * Women's Aid Organisation, a Malaysian non-governmental organization
 * World Allergy Organization
 * World Autism Organisation
 * Yōka Wao (born 1968), Japanese actress
 * Oscar Wao, protagonist of The Brief Wondrous Life of Oscar Wao