Judith Jeptum Korir (born 12 December 1995) is a Kenyan marathon runner.

[1] Korir won the 2021 Abu Dhabi Marathon in a time of 2:22:30.

[2][3] She secured victory at the 2022 Paris Marathon, setting a new course record and a new personal best time of 2:19:48.

[4][5] Korir was selected by Kenya to run in the 2022 World Athletics Championships – Women's marathon in which she finished second to earn the silver medal in a new personal best time of 2:18:20.

[6] Korir finished in sixth place at the 2023 London Marathon.