Sergey Alexandrovich Mozgov (; born 10 March 1995) is a Russian retired competitive ice dancer. With former partner Betina Popova, he is the 2017 CS Warsaw Cup champion. With former partner Anna Yanovskaya, he was the 2015 World Junior champion, two-time (2013, 2014) JGP Final champion, the 2012 Youth Olympics champion, the 2014 World Junior silver medalist, and the 2015 Russian junior national champion.