Kerttu Elina Niskanen is a Finnish cross-country skier. She is a four-time Olympic medalist.

The FIS Nordic World Ski Championships 2015 took place between 18 February and 1 March 2015 in Falun, Sweden. This was the fourth time the event is held there, having previously been held there in 1954, 1974 and 1993. In 1980, one World Ski Championship race was held there as well, to make up for its exclusion from the Olympic Games the same year.