Wojciech Śleszyński (born 1970) is a Polish historian and dean of the History and Sociology Faculty at the University of Białystok.
In 1996, Śleszyński graduated from the History Department at the Białystok campus of the University of Warsaw.
In 2001 he received his PhD at the Faculty of History and Sociology of the University of Białystok, based on the dissertation "Propaganda i indoktrynacja władz sowieckich na Białostocczyźnie w latach 1939–1941" (Propaganda and indoctrination of the Soviet authorities in the Bialystok region in 1939–1941).
In 2008 he received his habilitation at the Institute of Political Studies of the Polish Academy of Sciences, with the dissertation "Bezpieczeństwo wewnętrzne w polityce państwa polskiego na ziemiach północno-wschodnich II Rzeczypospolitej" (Internal security in the policy of the Polish state in the north-eastern territories of the Second Republic of Poland).
In 2008, he was appointed head of the Department of Political Relations of the University of Białystok .