(Аягөз, formerly Сергиополь, Sergiopol`
) is the administrative center of Ayagoz District
in East Kazakhstan Province
. Ayagoz was founded in 1831 on the Ayagoz River
, and it currently has approximately 35,000 inhabitants. It is a major railway station on the Turksib
The 78th Tank Division, formerly of the Soviet Army but now part of the Kazakh Ground Forces is based here.