The Oskemen Hydroelectric Power Plant (, Óskemen GES), also known as Ust-Kamenogorsk Hydroelectric Power Plant, is a hydroelectric power plant on the Irtysh River near Oskemen in East Kazakhstan Province of Kazakhstan. It has 4 individual turbines with a nominal output of 82.8 MW (3 were renewed - 95 MW) with a generating capacity of 367.8 MW and generates 1.58 billion kilowatt-hours of electricity per year. Formerly owned and operated by AES Corporation, in 2023 ownership was transferred to Samruk-Energy.