Olivier Mwimba Sefu (born 6 November 1994) is an Olympic athlete from the Democratic Republic of Congo.

Mwimba qualified from his preliminary heat at the Athletics at the 2020 Summer Olympics – Men's 100 metres race, in a time of 10.63 seconds.

[1] Born in Zaire, Mwimba moved to South Africa at a young age and studied accounting at the Tshwane University of Technology in Pretoria.

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