Calvyn Justus (born 14 December 1995) is a South African swimmer. He competed in the men's 4 × 200 metre freestyle relay event at the 2016 Summer Olympics.[3] He is an alumnus of Westville Boys' High School.[4]

Justus maintains a YouTube channel; as of 24 July 2017, the channel has over 66,000 subscribers and over 4.4 million views.[5]