Petrus Arnoldus Crous (born 2 July 1955) is a South African former professional boxer who competed from 1977 to 1987.
Crous turned pro in 1977.
He won the WBA cruiserweight title with a unanimous decision win over Ossie Ocasio in 1984, though he was paid less than $10,000. He defended the belt once, on 30 March 1985, at the Sun City Super Bowl in Sun City, South Africa, against American challenger Randy Stephens, recuperating from a third-round knockdown to knock Stephens out in that same third round. Crous became the first South African to retain a world boxing title in 35 years. He lost the title to Dwight Muhammad Qawi via TKO the following year; he was knocked down twice in the 11th round.
He retired in 1987.