Stefan Winter was born on 13 July 1908 in Lódz, Piotrków Governorate, Congress Poland, Russian Empire [now Lódz, Lódzkie, Poland]. He was married to Maria Romualda Szubert. He died on 20 July 1973 in Rzeszów, Rzeszowskie, Polish People's Republic [now Rzeszów, Podkarpackie, Poland].