Jackline Wambui

Jackline Wambūi is a Kenyan middle-distance runner who competes in the 800 metres event.
Wambūi won the gold medal in the 800 meters at the 2017 IAAF [World U18 Championships] in Nairobi. The following year, she finished eighth at the 2018 [IAAF World U20 Championships – Women's 800 metres|2018 IAAF World U20 Championships] in Tampere. In April 2019, she won the African Junior Championships in Abidjan, and then in August won the Kenyan National Championships.
She withdrew from the 2019 IAAF [World Athletics Championships] after not taking a mandatory testosterone level test. In 2024, World Athletics filed a CAS case against Wambūi and the Anti-Doping Agency of Kenya related to the violation.
Her personal best for the 800m is 1:58.79, set at Nyayo [National Stadium], Nairobi, on 13 September 2019.