They run together the company "Huligans" in which Marcelina sews suits for ski jumpers (she sewed the suit, in which Kamil Stoch won two gold medals at Olympic Games in Sochi). Stefan and Marcelina have a daughter Milena (born 2011). In March 2017, he announced the upcoming birth of their second child.
Stefan Hula Jr. was born in Szczyrk, Poland. His father Stefan Hula Sr. is a former Nordic combined skier and bronze medalist at the 1974 FIS Nordic World Ski Championships in Falun. Hula Jr. has a brother, Przemysław, and two sisters, Katarzyna and Magdalena, who were trained in sledging.