Gerrit Jan Dimmendaal (born 1955) is a Dutch linguist and Africanist.
His research interests focused mainly on the Nilo-Saharan languages.
[1][2] He completed his studies (1973–1978) in African studies, Arabic studies, history, and comparative literature at Leiden University, and graduating with a doctorate in 1982.
He has been Professor of African Studies at University of Cologne since 2000.