OGK

OGK may refer to:
 * The OGK, a professional wrestling tag team
 * The extraterritorial energy companies of the wholesale electricity market (Оптовая генерирующая компания, ОГК), separated from RAO UES
 * OGK-1
 * OGK-2
 * OGK-3
 * OGK-4, now Unipro
 * OGK-5, now Enel Russia
 * OGK-6