 Together with the communities of Kleinkahl, Krombach, Schöllkrippen, Sommerkahl, Westerngrund and Wiesen, Blankenbach forms the "Verwaltungsgemeinschaft" (Administrative Community) of Schöllkrippen in the Kahlgrund.In 1966, the two communities of Großblankenbach and Kleinblankenbach, which lay on the Kahl’s right and left banks respectively, merged into the community of Blankenbach.While Großblankenbach had formerly belonged to the Counts of Schönborn, Kleinblankenbach had been an Electoral Mainz holding.