Pirkko Sisko Määttä (born 7 March 1959) is a Finnish former cross-country skier who was born in Kuusamo and competed from 1982 to 1995.
She won two 4 × 5 km relay bronze medals (1984, 1988) at the Winter Olympics.
Määttä won a complete set of medals at the 1989 FIS Nordic World Ski Championships with a gold in the 4 × 5 km relay, a silver in the 10 km classical, and a bronze in the 15 km.
She earned her only individual victory at a 1992 event in Norway.