Kazimierz Marcinkiewicz (Polish pronunciation: [ka'?imj?? mart?i?'k??vit?] (listen); born 20 December 1959) is a Polish conservative politician who served as Prime Minister of Poland from 31 October 2005 to 14 July 2006.
He was a member of the Law and Justice party (Prawo i Sprawiedliwosc, PiS).