Steven Dennis Dewick (born 2 February 1976) is an Australian backstroke swimmer who won a bronze medal in the 4×100-metre medley relay at the 1996 Summer Olympics in Atlanta.

Dewick made his senior international debut when he was selected for Australia to compete at the Oceania Championships in 1993.

A star at the 1994 Commonwealth Games in Victoria, British Columbia, Canada, he collected a silver medal in the 100-metre backstroke, and a gold medal in the 4×100-metre medley relay.

In Atlanta, Dewick combined with Phil Rogers, Scott Miller and Michael Klim to trail the United States and Russia teams into third place.

A great achievement considering Steven was swimming with a broken back from an accident at the Olympic village two days prior to the start of the 1996 games.