Edna Ngeringwony Kiplagat (born 15 September 1979) is a Kenyan long-distance runner. She is the 2011 and 2013 IAAF World Champion in the marathon. She established herself as an elite marathon runner with wins at the Los Angeles and New York City Marathons in 2010. Her personal best for the distance is 2:19:50 hours, set at the London Marathon in 2012.