Josua "Poens" Prinsloo (11 October 1935 – 13 June 2017) was a South African international rugby union player.
Prinsloo was born and raised in the town of Piketberg in Cape Province.
In 1959, Prinsloo represented South Africa as a pole vaulter.
Prinsloo, a policeman by profession, played rugby for Northern Transvaal and was capped once by the Springboks, deputising for number eight Doug Hopwood against the touring 1963 Wallabies at Ellis Park.