Sergey Renev (born 3 February 1985) is a Kazakhstani former road bicycle racer who rode at UCI WorldTeam level for Astana from 2009 to 2012. He completed the 2010 Vuelta a Espana, and was twice (2008 and 2013) runner up in his national championship. He also competed in the 2010 Milan–San Remo and in the road race at the 2011 UCI Road World Championships.