Kétou is a Yoruba town, arrondissement, and commune located in the Plateau Department of the Republic of Benin. The commune covers an area of 2183 square kilometres and as of 2013 had a population of 156,497 people, making it the 13th largest settlement in Benin.

Yoruba is a language that is spoken in West Africa, primarily in Southwestern and Central Nigeria. It is spoken by the ethnic Yoruba people. The number of Yoruba speakers is roughly 47 million, including about 2 million second-language speakers. As a pluricentric language, it is primarily spoken in a dialectal area spanning Nigeria, Benin, and Togo with smaller migrated communities in Côte d'Ivoire, Sierra Leone and The Gambia.