Pirjo Muranen (née Manninen, born 8 March 1981 in Rovaniemi) is a retired Finnish cross-country skier.

She won a bronze medal in the 4 × 5 km relay at the 2010 Winter Olympics in Vancouver.

She married on 30 June 2007; previously known by her maiden name of Pirjo Manninen.

She is the younger sister of Nordic combined skier Hannu.

She has then worked as a cross-country skiing pundit and studio commentator for Finland's national public-broadcasting company Yle.