Oleg Dmitriyevich Kononenko (; ; born June 21, 1964 in Turkmenistan) is a Russian cosmonaut from the Turkmen SSR. He has flown to the International Space Station four times, as a flight engineer for Expedition 17 aboard Soyuz TMA-12, as a flight engineer on Expedition 30 and commander of Expedition 31 aboard Soyuz TMA-03M, as a flight engineer on Expedition 44 and Expedition 45 aboard Soyuz TMA-17M, and as commander of Expedition 58 and Expedition 59 aboard Soyuz MS-11. Kononenko accumulated over 736 days in orbit during his four long duration flights to ISS.