Stefan Feliks Bialas (born 8 December 1948 in Siemianowice Slaskie) is a former Polish football player and manager.
He played for several Polish clubs, including Ruch Chorzów, Legia Warsaw and Slask Wroclaw.
He then moved to France and played for Gueugnon, Besançon, Nœux-les-Mines, Paris FC and Creil.
He later began a coaching career, with Compiègne, Creil, Beauvais, Club Olympique des Transports and Stade Tunisien, and working briefly as a coach for Cracovia in 2006.
On 12 May 2006 Bialas was appointed as the manager of Jagiellonia Bialystok.
On 7 June 2008 he mutually terminated his contract with the club.
On 14 March 2010 he was officially named as the head coach of Legia Warsaw, where he was replaced by Maciej Skorza on 1 June 2010.He has commentated for several Canal + during the Ligue 1 matches.