Johan Willem Friso Wielenga (born 1956)[1] is a Dutch contemporary historian.
Born in Rotterdam, Wielenga studied history and politics at the Vrije Universiteit Amsterdam from 1975 to 1978 and in 1982/1983 with a German Academic Exchange Service scholarship at the Rheinische Friedrich-Wilhelms-Universität Bonn.
In 1992, he became associate professor of German Contemporary history and Dutch-German relations at the University of Groningen and in 1997 associate professor of German contemporary history at the University of Utrecht.
Wielenga has been director of the Haus der Niederlande [de] at the Westfälische Wilhelms-Universität between 1999 and 2021.
He works as a journalist for the Dutch daily newspapers de Volkskrant and NRC Handelsblad.