Old Turkish or Old Anatolian Turkish (Latin Turkish: Eski Türkçe/Eski Anadolu Türkçesi, Turco-Arabic: تورکچه‌سی اسکی تورکچه اسکی انادولو), also referred to as Old Anatolian Turkic (Turkish: Eski Anadolu Türkisi, Old Turkish: انادولو تورکیسی اسکی), was the form of the Turkish language spoken in Anatolia from the 11th to 15th centuries. It is also called Turkce or Turki, it developed into Early Ottoman Turkish and Middle Azerbaijani. It was written in the Perso-Arabic script. Unlike in later Ottoman Turkish, short-vowel diacritics were used.

It had no official status until 1277, when Mehmet I of Karaman declared a firman in an attempt to break the dominance of Persian:

It has been erroneously assumed that the Old Anatolian Turkish literary language was created in Anatolia and that its authors transformed a primitive language into a literary medium by submitting themselves to Persian influence.^{[by whom?]} In reality, the Oghuz Turks who came to Anatolia brought their own written language, literary traditions and models from Khwarezm and Transoxiana.

The Ajemic-Turkish also known as Classical Azerbaijani language descended from Old Anatolian Turkish. Ajemic-Turkish started to form its shape in the Aq Qoyunlu, Qara Qoyunlu eras, and, especially, the Safavid era. It is the old form of Modern Standard Azerbaijani

Following texts are excerpts of the Qabus-Nama, taken from Turan Fikret's work: "Old Anatolian Turkish: Syntactic Structure" (1996):