Kétou [ke.tu] is a Yoruba town, arrondissement, and commune located in the Plateau Department of the Republic of Benin (previously called Dahomey).

The commune covers an area of 2183 square kilometres and as of 2013 had a population of 156,497 people,[1][2] making it the 13th largest settlement in Benin.

[3] The current mayor is Lucie Ablawa Sessinou of the Progressive Union.

Kétou (Ketu) is said to have been founded by Ede, son of Sopasan and grandson of Oduduwa (also known as Odùduwà or Oòduà), who ruled the Yoruba kingdom of Ilé-Ifẹ̀ (also known as Ife) in present-day Nigeria.

Most Gbe speaking people (Ewe, Adja, Fon, and speakers of Phla-Phera languages) trace their origins to Ketou.