Jan Ferdynand Olszewski (['jan ?l'??fsk?i] (listen); 20 August 1930 – 7 February 2019) was a Polish conservative lawyer and politician who served as the Prime Minister of Poland for five months between December 1991 and early June 1992 and later became a leading figure of the national conservative Movement for the Reconstruction of Poland.
Olszewski's premiership was the second shortest in the history of the Third Republic.