Sergei Gennadyevich Slavnov (; born 11 March 1982) is a Russian pair skater. He is best known for his partnership with Julia Obertas, with whom he competed from 2003 to 2007. Together, they are the 2005 European silver medalists. Previously, Slavnov competed with Julia Karbovskaya, with whom he is the 2002 World Junior silver medalist.