Daniel Steven Kowalski (born 2 July 1975) is an Australian former middle- and long-distance swimmer specialising in freestyle events.

Kowalski was part of the world record-setting Australian gold medal 4 × 200-metre relay team at the 1998 Commonwealth Games.

Kowalski also holds 400-metre freestyle long-course masters world record in the 30-to-34 age group which he set on 2 May 2009 in a time of 3:58.42.

[2] In February 2004, he was the host of an overnight program on SEN 1116 with former South East Melbourne Magic basketballer Andrew Parkinson.

[3] Kowalski says he was inspired to come out by Welsh rugby player Gareth Thomas, who announced the previous December that he was gay.