Johannes Adriaan Retief is a Namibian rugby union player for the Namibian national team and for the Leopards in the Currie Cup and the Rugby Challenge. His regular position is lock or flank.

Retief was born in Windhoek. He made his test debut for Namibia in 2017 against Spain and represented the Leopards in the South African domestic Currie Cup and Rugby Challenge since 2018.