Benjamin Treffers (born 15 August 1991)[1] is an Australian competitive swimmer who has participated in the FINA World Championships and Commonwealth Games.

[2] Treffers is a former Australian Record Holder and Commonwealth Champion in the 50m backstroke event.

[7] Coached by John Fowlie,[8] Treffers won the title of 2011 Australian Champion in the Men's 100m Backstroke event[9] and represented Australia at the 2011 World Championships in Shanghai, having narrowly missed out on a place at the 2010 Commonwealth Games.

[10] In 2018, Ben was appointed a brand ambassador for men's active lifestyle wear SQD Athletica.

Treffers is the son of Mark Treffers, who won a gold medal swimming for New Zealand at the 1974 British Commonwealth Games, and the nephew of Lynne Dalzell and Paul Rowe, who swam internationally for New Zealand and Australia, respectively.