Stephen John Stewart (born 7 March 1978) was an Olympic-level rower, who competed for Australia. 
He is the younger brother of the dual bronze medal winning Olympic rowers James Stewart and Geoffrey Stewart. They were the first trio of brothers to represent Australia in rowing at the same Olympics and were all educated at Newington College (1985-1995)  and coached by olympian and fellow Old Newingtonian Michael Morgan.
- ^ Olympic Profile
- ^ Newington College Register of Past Students 1863-1998 (Syd, 1999) pp 190