Joshua Beaver (born 1 March 1993) is an Australian swimmer who specialises in backstroke. He competed at the 2016 Summer Olympics in the 100 metre backstroke and the 200 metre backstroke.[1][3] He finished 13th and 10th in the semifinals, respectively.

Beaver also competed in the 200 metre backstroke at the 2015 World Aquatics Championships in Kazan and is a Commonwealth Games medalist. Competing at the 2014 Commonwealth Games in Glasgow, he won silver in the 200m backstroke and 4 × 100 m medley relay, and bronze in the 100m backstroke.