Kirsti Lay (born 7 April 1988) is a Canadian former professional racing cyclist,[3] who rode professionally for UCI Women's Team Rally UHC Cycling between 2016 and 2019.

She rode at the 2015 UCI Track Cycling World Championships,[4] winning a bronze medal in the Team Pursuit.

[6] She won the bronze medal in the team pursuit event.

Prior to taking up cycling Lay was a speed skater, competing at the World Junior Speed Skating Championships in 2005, 2006 and 2007[7] and at the 2009 Winter Universiade.

[8] Lay is married to Canadian former speed skater Mathieu Giroux.