Oleg Aleksandrovich Zhestkov (Russian: ???? ????????????? ???????; born 20 January 1987) is a Russian sprint canoeist who competes in the four-man K-4 1000 m event.
He won the world title in 2013, placing third in 2011, and had a silver medal at the 2016 European Championships.
His teams finished seventh at the 2012 and ninth at the 2016 Olympics.In March 2019 Zhestkov tested positive for the banned substance EPO, receiving a four-year ban.Zhestkov was born in Omsk, but later moved to Krasnodar.
He took up kayaking following his two brothers, his mother and his cousin.