Julius Korir (born 21 April 1960) is a former Kenyan athlete, who won the 3.000 m steeplechase at the 1984 Summer Olympics.

He rose into the international athletics scene in 1982, when he surprisingly won the gold medal at the Commonwealth Games.

In the Olympic final, Korir was always with the leaders, and when he started his sprint for home with just over half a lap remaining, the rest of the field were unable to match his speed.

Korir missed the 1985 season due to injury, and although he competed for several more years, he never again represented his country at a major international championships.

Running for the Washington State Cougars, he won the 1984 NCAA Division I Outdoor Track and Field Championships title in the 5000 m, and the 1986 NCAA Division I Outdoor Track and Field Championships title in the 3000 m steeplechase.