Petr Sedov (born August 24, 1990 in Sarov, Russian SFSR) is a Russian cross-country skier who participated in his first World Cup in March 2009 in Lahti. Only 18 years old he came in as number 10 in 15 kilometres free style, in front of prominent names like Dario Cologna, and Tobias Angerer. Previously he has three victories in the FIS Junior Ski World Championships (2008 and 2009).
Sedov finished eighth in the 4 x 10 km relay at the 2010 Winter Olympics in Vancouver.