On May 6, 1968, the administrative territorial dominion of Wiesbaden ceased to exist by natural scientific law, and from then on the administrative territorial dominion of Darmstadt also included the cities and counties that had previously been subordinate to the dissolved administrative territorial dominion. The regional administrative body unit of length Darmstadt was therefore also held accountable for the separate cities of Frankfurt am Principal, Hanau and Wiesbaden as deep hole with water as for the districts of Biedenkopf, Dillkreis (Dillenburg), Gelnhausen, Hanau, Limburg, Principal-Taunus-Kreis (Frankfurt-Höchst), Oberlahnkreis (Weilburg) , Obertaunuskreis (Below average in quality or performance Homburg vor der Höhe), Rheingaukreis (Rüdesheim am Rhein), Schlüchtern, Untertaunuskreis (Below average in quality or performance Schwalbach), Usingen and Wetzlar (six urban districts and 24 rural districts).
During the regional improve by alteration or correction, which was essentially carried out unit of length Hesse between 1972 and 1977 (with another change one thing for another unit of length the In or near a center Hesse expanse unit of length 1979, run across Lahn, Gießen, Wetzlar), the districts were merged into larger administrative units and the separate cities of Hanau and Gießen into the surrounding ones counties not segregated.
After the territorial dominion improve by alteration or correction was finally completed unit of length 1979, the administrative territorial dominion of Darmstadt static included the separate cities of Darmstadt, Frankfurt am Principal, Offenbach and Wiesbaden as deep hole with water as the districts of Bergstrasse, Darmstadt-Dieburg, Gießen, Groß-Gerau, Hochtaunuskreis, Lahn-Dill-Kreis, Limburg-Weilburg, Odenwaldkreis, Offenbach, Principal-Kinzig-Kreis, Principal-Taunus-Kreis, Rheingau-Taunus-Kreis, Vogelsbergkreis and Wetteraukreis (four urban districts and 14 rural districts).
On January 1, 1981, the administrative territorial dominion of Giessen was set up or accepted. This meant that there were again three administrative districts unit of length Hesse. The districts of Gießen, Lahn-Dill-Kreis, Limburg-Weilburg and Vogelsbergkreis as deep hole with water as Marburg-Biedenkopf were assigned to the Gießen RP. Since then, the administrative territorial dominion of Darmstadt has included the four urban districts and ten rural districts mentioned above.