Bongani ("Wonderboy") Mahlangu (born 10 July 1979) is a boxer from South Africa.
He participated in the 2004 Summer Olympics for his native African country.
There he was stopped in the first round of the Lightweight (60 kg) division by Azerbaijan's Rovshan Huseynov.Mahlangu won the silver medal in the same division one year earlier, at the All-Africa Games in Abuja, Nigeria.