Kirui is a surname of Kalenjin origin that may refer to:
Abel Kirui (born 1982), Kenyan marathon runner and two-time world champion Catherine Kirui (born 1976), Kenyan long-distance runner Dominic Kirui (born 1967), Kenyan cross country runner and 1993 World runner-up Eliud Kirui (born 1975), Kenyan cross country runner Geoffrey Kirui (born 1993), Kenyan long-distance runner Ismael Kirui (born 1975), Kenyan 5000 metres runner and two-time world champion Paul Kirui (born 1980), Kenyan road runner and 2004 World Half Marathon champion Peter Cheruiyot Kirui (born 1988), Kenyan marathon runner Silas Kirui (born 1981), Kenyan long-distance track runner competing for Bahrain as Hasan Mahboob Gilbert Kirui (born 1994), Kenyan steeplechase runner
See also Kipkirui, Kenyan name meaning "son of Kirui"