Reinhard Wenskus (10 March 1916 – 5 July 2002) was a German historian who was Professor of Medieval History at the University of Göttingen.

After the war, Wenskus gained his abitur in Hanover and subsequently studied history, ethnology and Germanistics at the University of Marburg.

Wenskus subsequently worked as a research assistant, and gained his habilitation at Marburg in 1959 with the thesis Stammesbildung und Verfassung.

In addition to being a historian by profession, Wenskus was highly learned in linguistics, archaeology and ethnology, and sought to use evidence from these disciplines as a way to get a better understanding of history.

Along with Herbert Jankuhn, Kurt Ranke, Hans Kuhn and Schramm, Wenskus was a co-founder of the second edition of the Reallexikon der Germanischen Altertumskunde, to which he contributed a large number of articles.