Steven Bayliss (born 7 July 1960) is a Welsh former rugby union, and professional rugby league footballer who played in the 1970s and 1980s. He played club level rugby union (RU) for Ystradgynlais RFC, as a wing, or centre, and representative level rugby league (RL) for Wales, and at club level for St Helens (two spells), Fulham and Lézignan Sangliers, as a or .
Bayliss won a cap for Wales (RL) while at St. Helens in 1981.