Hellen Onsando Obiri is a Kenyan middle- and long-distance runner. She is the only woman to have won world titles in indoor track, outdoor track and cross country. Obiri is a two-time Olympic 5000 metres silver medallist from the 2016 Rio and 2020 Tokyo Olympics, where she also placed fourth over the 10,000 metres. She is a two-time world champion after winning the 5000 m in 2017 and again in 2019, when she set a new championship record. Obiri also took world bronze for the 1500 metres in 2013 and silver in the 10,000 m in 2022. She won the 3000 metres race at the 2012 World Indoor Championships, claimed silver in 2014, and placed fourth in 2018. She is the 2019 World Cross Country champion. Obiri triumphed in the 2023 Boston Marathon, her second marathon race. She places fifth in the half marathon on the world all-time list.