Sergey Morozov (born 21 March 1988) is a Russian race walker who competes in the 20 kilometres walk.

[6] He made his senior debut in September at the IAAF Race Walking Challenge Final in his native Saransk, but was disqualified for lifting.

[7] Stepping up to the senior 20 km distance, he competed at the Russian Winter Championships, but was again disqualified.

He was among the favoured athletes for the 2008 Olympic title but he was suspended after a positive test for erythropoietin (EPO) and was given a two-year ban from the sport, lasting until September 2010.

[13] Morozov opened 2012 with a second-place finish behind Andrei Ruzavin at the Russian Winter Championships.