Aino-Kaisa Saarinen (born 1 February 1979) is a retired Finnish cross-country skier who competed in the World Cup between 1998 and 2018.

With 354 individual World Cup starts, Saarinen is the current record holder for both men and women, with Stefanie Böhler in second place with 343.

She has six individual victories in FIS races since 2002, but did not win her first World Cup event until she won the 30 km classical event at the Holmenkollen ski festival on 17 March 2007.

Saarinen finished second in the 2008/09 Tour de Ski behind Virpi Kuitunen.

All results are sourced from the International Ski Federation (FIS).