Rafał Wnuk (born 22 May 1967 in Zamość) is a Polish historian, editor of several historical periodicals, employee of the Institute of History of the Polish Academy of Sciences and of the Polish Institute of National Remembrance (IPN). Wnuk was a student of the Polish historian Tomasz Strzembosz.
Wnuk specializes in Polish-Ukrainian relations during World War II as well as in the history of Polish resistance (primarily of Armia Krajowa) in the former eastern Polish regions (Kresy), as well as the history of totalitarian systems. He was the author of one of the most important books on the Polish underground in the Lublin region in 2000. Together with Sławomir Poleszak, Agnieszka Jaczyńska and Magdalena Śladecka he is the editor of "The Atlas of the Polish Independent Underground 1944-1956" (Atlas Polskiego Podziemia Niepodległościowego 1944 – 1956) published in 2007 by the IPN. Wnuk works at the Museum of World War II in Gdańsk and the Catholic University of Lublin.