Tadeusz Jacek Wozniak (born January 15, 1960 in Kutno) is a Polish politician.
He was first elected to Sejm on September 25, 2005 getting 5396 votes in 11 – Sieradz district as a candidate from the Law and Justice (PiS) list.
On 4 November 2011 he, along with 15 other supporters of the dismissed PiS MEP Zbigniew Ziobro, left Law and Justice on ideological grounds to form a breakaway group, United Poland.