Jerzy Owsiak (born 6 October 1953 in Gda?sk) is a Polish journalist and social campaigner. He is a founder and President of the Wielka Orkiestra ?wi?tecznej Pomocy (WO?P), one of the largest non-governmental, non-profit, charity organizations in Poland. Owsiak is the main initiator and activist for the group's Grand Finale, an annual worldwide festival involving music and other components intended to raise money for the medical care of children suffering from urological and kidney diseases. He is also the creator of Przystanek Woodstock (simply: the "Woodstock Festival"), a large rock music festival that takes place in Kostrzyn, to thank all the volunteers and supporters who take part in the Grand Finale each year.Owsiak is married to Lidia Nied?wiedzka-Owsiak, the Medical Affairs Director for the WO?P. He is also a stained glass maker, and he has qualifications in Psychotherapy.