Purity Cherotich Kirui (born 13 August 1991) is a Kenyan long-distance runner who specialises in the 3000 metres steeplechase. She holds a personal best of 9:19.42 minutes for the event. She was the gold medallist at the 2014 Commonwealth Games and the 2010 World Junior Championships in Athletics.Born in Kericho, her international debut came at the 2008 Commonwealth Youth Games, where she was seventh in the 1500 metres and also ran for Kenya as part of their 4×400 metres relay.