Sergei Voronov (born 5 February 1971) is a Russian former professional hockey defenseman who was active from 1992 until 2008.
Despite a poor playoff series against the Renegades during his rookie season, Voronov was reassigned to the Penguins to the Las Vegas Thunder of the International Hockey League to replace Kevin Dahl, who had been recently recalled by the Phoenix Coyotes and were the primary affiliate of the Thunder.
General Manager Bob Strumm said he liked the addition of Voronov, saying that he added a "hacking and whacking element that had been missing since the trade of Jeff Ricciardi."
While assigned to the Thunder, Voronov was reunited with former Dynamo teammate Alexei Yashin, who were on the same team during the 1992–93 season.
After two seasons in the North American minor leagues, Voronov returned to Russia.