The Ayagöz (Kazakh: Аягөз) also spelled Ayaguz and Ayaköz,[1] is a river of the Balkhash-Alakol Basin, Kazakhstan.

[2] In 1717, Kaip Khan and Abul Khayr attacked the Dzungar Khanate but were defeated on the River Ayagöz.

Prince Gortchakoff, governor of Western Siberia, sent an officer named Assanoff in 1839 with some men to Lake Balkash to see if a fishing station could be established.

[4][5] Kuzu-Kerpetch was a Kyrgyz chief known from folk songs for valor and his love for Baian Sulu (who eventually caused his death)[4] The river's reedy lower section was once tiger habitat.

[6] The river turned up an Ordovician trilobite fossil, an Agerina acutilimbata (see list of trilobite genera), found by Ghobadi Pour et al. in 2011 in Katian, Karagech Formation on the east side of the Ajaguz River 7 kilometres (4 mi) north of Akchii village in the Tarbagatai Range.