Jan Krzysztof Bielecki (born 3 May 1951) is a Polish centre politician. He served as Prime Minister of Poland for most of 1991. He is a member of Civic Platform. Chairman of the Council of the Polish Institute of International Affairs.
Since 1980 Bielecki was an advisor to Solidarność on economic policy. In 1990 he joined the Liberal Democratic Congress (Kongres Liberalno-Demokratyczny, KLD) which became part of the Freedom Union (Unia Wolności, UW) in 1994. In 2001 Bielecki joined the newly founded Civic Platform (Platforma Obywatelska, PO).
After being Prime Minister in 1991 he served as Minister for European Integration in the cabinet of Hanna Suchocka from 1992 to 1993. From 1993 to 2003 Bielecki represented Poland at the European Bank for Reconstruction and Development. Afterward he joined Bank Pekao S.A. (Bank Polska Kasa Opieki Spółka Akcyjna, Pekao). On 25 November 2009 it was reported that Bielecki resigned from his position as the CEO of Pekao. The press and some politicians subsequently speculated that this might be because of his plans to replace Donald Tusk as Prime Minister, to run for presidency or other political role.