Ketou may refer to:

• Kétou, Benin, Yoruba town, arrondissement, and commune located in the Plateau Department of the Republic of Benin
• Ketu (Benin), historical region of what is now the Republic of Benin
• Ketou Township, a township of Xinhua County, Hunan, China
• "Ketou" or kowtow, the Chinese act of respect shown by kneeling and bowing

• Lensink Peak
• Lensk Airport
• Lensk district
• Lenskii Ulus
• Lens kit
• Lenski Ulus
• Lenskiy Ulus
• Lensko
• Len Skowronski
• Lensky (disambiguation)
• Lensky District, Sakha Republic
• Lensky Ulus
• Lens-Lestang
• Lensmaker equation
• Lensmaker formula
• Lensmakers' equation
• Lensmakers equation
• Lensmaker's formula
• Lensmakers forumula
• Lensmakers' forumula
• Len Small (footballer)
• Lensman
• Lensman (comics)
• Lens manufacturing
• Len Smelt