Geoffrey Kipkorir Kirui (Born 16 February 1993) is a Kenyan long-distance runner who competes in cross country running competitions, track and road races up to the marathon.

[1] At the 2013 IAAF World Cross Country Championships, he finished 15th in the senior men's race.

[3] Kirui participated in the 2017 World Championships held in London, winning the gold in the Marathon, with a time of 2:08:27.

[4][5] In 2019, he competed in the men's marathon at the 2019 World Athletics Championships held in Doha, Qatar.

[6] In 2020 Geoffrey competed at the Valencia Marathon, however he DNF in a race won by Kenya's Evans Chebet in 2:03:00.