Peter Mlynár (born March 1, 1988, in Poprad) is a Slovak cross-country skier who has been competing since 2007. At the 2010 Winter Olympics in Vancouver, he finished 12th in the 4 x 10 km relay and 57th in the individual sprint event.
Mlynár's best World Cup finish was 17th in a 4 x 10 km event in Norway in 2009, while his best individual finish was 47th in an individual sprint event in Finland that same year.