Viatcheslav Vladimirovich Ekimov (Russian Вячеслав Владимирович Екимов; born February 4, 1966 in Vyborg near St Petersburg), nicknamed Eki, is a Russian former professional racing cyclist. A double Olympic gold medalist, he was awarded the title of Russian Cyclist of the Century in 2001.

Ekimov started training as a cyclist at age 12 with a bicycle school affiliated with the famous centre of Aleksandr Kuznetsov. He trained in Leningrad at Lokomotiv and later Armed Forces sports society during the Soviet era. He first competed professionally in 1990.

Ekimov won two Olympic gold medals: in the track team pursuit in Seoul (1988) for the USSR, and in an upset, in the road time trial in Sydney (2000) for Russia. At the 2004 Summer Olympics in Athens, Ekimov won the silver medal for Russia in the men's road individual time trial, losing to American Tyler Hamilton. Hamilton's initial blood sample tested positive for blood doping, but the lab mistakenly froze the backup sample, rendering it unsuitable for the required second test. Though the Russian Olympic committee appealed the final standings on Ekimov's behalf, the lab's error made it impossible to definitively establish Hamilton's culpability and the American retained the gold medal. (Hamilton again tested positive a few weeks later and received a two-year competition ban.)