Jan Wężyk (1575–1638), of Wąż Coat of Arms, was a Polish noble and Roman Catholic bishop and Primate of Poland.

[1] In 1619, he was selected by the King of Poland as Bishop of Przemyśl and confirmed by Pope Paul V on 17 Feb 1620.

[1] On 13 May 1624, he was appointed during the papacy of Pope Urban VIII as Bishop of Poznań and installed on 1 Jul 1624.

[1][2][3] He served as interrex (for 9 months) after the death of king Sigismund III Vasa in 1632, before the royal election of Władysław IV Waza.

[4] He was a political ally of Polish queen consort Constance of Austria, and took part in reform of church law in Poland.