Tadeusz Pieronek (pronounced [taˈdɛuʃ pʲɛˈrɔnɛk]; born 24 October 1934 in Radziechowy, Poland) is a Polish Roman Catholic auxiliary bishop-emeritus, Catholic academic and professor of theology and civil law. Pieronek is a leading member of the Stefan Batory Foundation (a George Soros Foundation branch in Poland).
Pieronek was born to Polish parents in the Zywiec Beskids village of Radziechowy near Żywiec in interbellum Poland. Ordained a priest in 1957 under the communist regime, from 1951-1954 he studied at the Theological Faculty of the Jagiellonian University in Cracow, then afters its dissolution by the Communist government at the major seminary of the archdiocese of Cracow, from 1956 until 1960 at the Faculty of Canon Law at the Catholic University of Lublin. From 1961 until 1965 he studied in Rome at the Pontifical Lateran University, specializing in civil law as well as canon law. He received his doctorate in 1975, and was appointed theology professor in 1987.