Kristin Størmer Steira (born 30 April 1981) is a retired Norwegian cross-country skier.

She competed from 2002 to 2015, and won six individual World Cup victories and five individual medals at the FIS Nordic World Ski Championships and Winter Olympic Games.

On 25 February 2010 Steira became an Olympic champion in the 4 × 5 km relay, racing in the third leg after Vibeke Skofterud and Therese Johaug and before Marit Bjørgen.

In the last event, 30 km mass start freestyle, she finally won the bronze, her only individual medal of the Winter Olympics.

She married Canadian skier Devon Kershaw, her boyfriend since December 2012, on 25 July 2015.