Keto may refer to:
The Ket people, an ethnic group of the Siberian North
Ceto or Keto, a sea goddess in Greek mythology
Ketone or keto group, the functional group in the chemical compounds ketones
Ketoconazole, a medication that can inhibit the production of testosterone in both the testes and adrenal gland
Ketogenic diet
Ketō (wikt:毛唐) or ketōjin (wikt:毛唐人), a derogatory term in Japanese referring to a white person (see also gaijin)
KETO-LP, a radio station (93.9 FM) licensed to serve Aurora, Colorado, United States

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