Ostyak is a name formerly used to refer to several indigenous peoples in Siberia.

Ostyak may also refer to:

Ethnic groups

• Khanty people or Ostyaks, indigenous people in Khanty–Mansi Autonomous Okrug, Russia
• Ket people or Yenisei Ostyaks, indigenous people of the Yenisei River basin, Krasnoyarsk Krai district, Russia
• Selkup people or Ostyak-Samoyeds, indigenous people in Tomsk Oblast, Krasnoyarsk Krai, Yamalo-Nenets Autonomous Okrug, and Nenets Autonomous Okrug, Russia
• Perm (Ostyak) Tatars, a subgroup of the Volga Tatars ethnic group

Language

• Yenisei-Ostyak, a language family whose languages are spoken in central Siberia
• Khanty language or Ostyak, language mainly spoken by the Khanty people
• Ket language or Yenisei Ostyak, the sole surviving language of a Yeniseian language family
• Selkup language, a language in the Samoyedic group of the Uralic language family mainly spoken by the Selkup people

See also

• Khutang or Ostyak harp, a type of harp played by the Khanty and Mansi people