Oku

Oku or OKU may refer to:


 * Oku, Cameroon, subdivision in the Northwest Region of Cameroon
 * Lake Oku, a crater lake on the Bamenda Plateau in the Northwest Region of Cameroon
 * Mount Oku, the largest volcano in the Oku Massif, in the Cameroon Volcanic Line
 * Oku language, a Grassfields Bantu language of Cameroon
 * Oku people (Sierra Leone), an ethnic group of Yoruba descent in Sierra Leone.
 * Ökü, a village in Azerbaijan
 * Oku District, Okayama, a former district located in Okayama Prefecture, Japan
 * Oku, Okayama, a former town in the district, merged with other towns to create the city of Setouchi
 * Oku (surname), a common Japanese surname
 * Princess Ōku (661–702), a Japanese princess during the Asuka period in Japanese history
 * OKU, IATA Airport Code for Mokuti Lodge Airport in Namibia
 * Ogan Komering Ulu Regency, a province in South Sumatra, Indonesia
 * Osaka Kyoiku University, a national university in Japan