Eliud Kipchoge (born 5 November 1984) is a Kenyan long-distance runner who competes in the marathon and formerly 5000 metres race. He won the Olympic marathon in 2016 and is the current marathon world record holder with a time of 2 hours 1 minute 39 seconds. Kipchoge's world record run at the 2018 Berlin Marathon broke the previous record by 1 minute, 18 seconds, the greatest improvement since 1967.

Kipchoge won his first individual world championship title in 2003 by winning the junior race at the IAAF World Cross Country Championships and setting a world junior record over 5000 m on the track. At the age of eighteen, he became the senior 5000 m world champion at the 2003 World Championships in Athletics with a championships record, then followed with an Olympic bronze for Kenya in 2004 and a bronze at the 2006 IAAF World Indoor Championships. A five-time World Championship 5000 m finalist, Kipchoge took silver medals at the 2007 World Championships, 2008 Summer Olympics and 2010 Commonwealth Games.

He switched to road running in 2012 and made the second-fastest ever half marathon debut with 59:25 minutes. On his marathon debut he won the 2013 Hamburg Marathon in a course record time. His first victory at a World Marathon Major came at the Chicago Marathon in 2014. He was a three-time winner at both the London Marathon and Berlin Marathon between 2015 and 2018. Described as "the greatest marathoner of the modern era", Kipchoge has won 11 of the 12 marathons he has entered, his only loss being to Wilson Kipsang Kiprotich at the 2013 Berlin Marathon (Kipchoge placed second), where Kipsang broke the world record. On 11 January 2019, Eliud Kipchoge won the Sportsman of the Year award at the 2019 Sports Personality of the Year awards in Kenya.