Korir is a surname. Notable people with the surname include:
Albert Korir (born 1994), Kenyan long-distance runner Emmanuel Korir (born 1995), Kenyan middle-distance runner Japhet Korir (born 1993), Kenyan long-distance runner John Cheruiyot Korir (born 1981), Kenyan middle and long-distance runner John Korir Kipsang (born 1975), Kenyan middle and long-distance runner Judith Korir (born 1995), Kenyan long-distance runner Julius Korir (born 1960), Kenyan middle and long-distance runner
Mark Korir (born 1985), Kenyan long-distance runner Sammy Korir (born 1971), Kenyan middle and long-distance runner Paul Korir (born 1977), Kenyan middle and long-distance runner Shedrack Kibet Korir (born 1978), Kenyan middle and long-distance runner Wesley Korir (born 1982), Kenyan long-distance runner and politician
See also Kipkorir, related surname meaning a boy born towards morning Jepkorir, related surname meaning a girl born around 6:30am