John Korir (born 2 December 1996) is a Kenyan road runner who specializes in the half marathon and marathon distances. He was the winner of the 2024 Chicago Marathon, in a time of 2:02:44, making him the sixth fastest marathoner in history. He won the 2025 Boston Marathon in a time of 2:04:45, and the 2026 Boston Marathon in a time of 2:01:52, setting the course record. His brother Wesley Korir won the 2012 Boston Marathon, making them the first brothers to win Boston.
Road running Year Road Race Location Rank Time2018Ottawa MarathonOttawa2nd2:09:142019Los Angeles MarathonLos Angeles2nd2:11:532019Frankfurt MarathonFrankfurt12th2:13:092021Los Angeles MarathonLos Angeles1st2:12:492022Los Angeles MarathonLos Angeles1st2:09:082022Chicago MarathonChicago3rd2:05:012023Boston MarathonBoston9th2:10:042023Chicago MarathonChicago4th2:05:092024Boston MarathonBoston4th2:07:402024Chicago MarathonChicago1st2:02:442025Boston MarathonBoston1st2:04:452025Chicago MarathonChicagoDNF2025Valencia MarathonValencia1st2:02:242026Boston MarathonBoston1st2:01:52 CR
World Marathon Majors Record World Marathon Majors 2022 2023 2024 2025 2026 Tokyo Marathon - - - - - Boston Marathon - 9th - 1st 1st London Marathon - - - - - Berlin Marathon - - - - - Chicago Marathon 3rd 4th 1st DNF - New York City Marathon - - - - -
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