RusHydro (previous name: Hydro-OGK, ) is a Russian hydroelectricity company. As of early 2012, it had a capacity of 34.9 gigawatts. In late 2009, it was the world's second-largest hydroelectric power producer and is the country's largest power-generating company and the largest successor to RAO UES. The partly government-owned conglomerate underwent a major consolidation beginning in July 2007. , the head of the company was Evgeny Dod. Its head office is in Obruchevsky District, South-Western Administrative Okrug, Moscow. In 2021, the company's revenue amounted to 190 billion rubles.
On 24 February 2022, in response to the Russian invasion of Ukraine, the United States sanctioned several Russian individuals, entities and financial institutions, including RusHydro.