Cornelius Kipkoech Tuwei (born 24 May 1993) is a Kenyan middle-distance runner specialising in the 800 metres.

Athletic career Cornelius Tuwei gained his first experience at international championships in 2018 at the Commonwealth Games in Gold Coast, Australia, where he was eliminated in the first round of the 800-meter event with a time of 1:47.10 min. The following year, he took part in the African Games in Rabat for the first time, winning the silver medal there in 1:45.41 min behind the Tunisian Abdessalem Ayouni. He then also won the silver medal at the Military World Games in Wuhan in 1:49.20 min, this time finishing behind Michał Rozmys of Poland.

Personal bests Outdoor 400 metres – 46.94 (Nairobi 2016) 600 metres – 1:15.40 (Liège 2023) 800 metres – 1:43.76 (Heusden-Zolder 2021) 1000 metres – 2:16.89 (Székesfehérvár 2018) 1500 metres – 3:35.34 (Berlin 2019) Indoor 800 metres – 1:46.47 (Toruń 2021) 1500 metres – 3:38.91 (Luxembourg 2021)

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