Ust-Kamenogorsk (Russian: Усть-Каменого́рск) or Oskemen (Kazakh: Өскемен, translit. Óskemen) is the administrative center of East Kazakhstan Region of Kazakhstan. It is served by Ust-Kamenogorsk Airport. Population: 303,720 (2009 Census results); 310,950 (1999 Census results).