Jacek Zygmunt Kościelniak (born 9 October 1963 in Dąbrowa Górnicza) is a Polish politician. He was elected to the Sejm on 25 September 2005, getting 3,765 votes in 32 Sosnowiec district as a candidate from the Law and Justice list.

• Members of Polish Sejm 2005-2007

• Jacek Kościelniak - parliamentary page - includes declarations of interest, voting record, and transcripts of speeches.

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