Sidney Guzman Villacosta (born October 12, 1977 in Lobitas, Talara) is a retired Peruvian Greco-Roman wrestler, who competed in the men's lightweight category. He obtained a bronze medal in the 58 kg division at the 1999 Pan American Games in Winnipeg, Manitoba, Canada, and later represented his nation of Peru at the 2004 Summer Olympics, finishing fifteenth in the process. Guzman also trained throughout his sporting career for Orlando Ochoa Wrestling Club in Lima under his personal coach and mentor Luis Jery Caceres.

Guzman qualified as a lone wrestler for the Peruvian squad in the men's 60 kg class at the 2004 Summer Olympics in Athens. Earlier, he placed second at the Pan American Championships in Guatemala City, Guatemala, but managed to fill up an entry by the Internationional Federation of Association Wrestling through a tripartite invitation. He lost his opening match to Japan's Makoto Sasamoto on technical superiority, but bounced back to defeat Serbia and Montenegro's Davor Stefanek in overtime with a 3-1 decision during the prelim pool round. Placing second in the pool and fifteenth in the final standings, Guzman failed to advance to the quarterfinals.