Sergey Vasilyevich Marchuk (Russian: Серге́й Васильевич Марчук; 13 April 1952 – 25 August 2016) was a Russian speed skater.

Biography

In 1977, Marchuk skated 3:56.65 on the 3,000 m on the fast Medeo rink of Alma-Ata, significantly below Ard Schenk's world record time of 4:08.3. Unfortunately for Marchuk, the tournament had not been approved by the International Skating Union (ISU) and so his time was not recognised as a world record. It would be 15 years before anyone, officially or unofficially, skated the 3,000 m faster than Marchuk had. This happened in 1992 when Thomas Bos skated an official world record of 3:56.16 at the indoor arena of Calgary – the Olympic Oval. Marchuk had his best year in 1978 when he became Soviet Allround Champion, European Allround Champion, and won bronze at the World Allround Championships.