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. 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.