Rheingau-Taunus is a Kreis in the west of Hesse, Germany. Rheingau-Taunus-Kreis is part of the Darmstadt region; its main administrative seat is Bad Schwalbach. Outposted sections of the local administration are located in Idstein and Rüdesheim am Rhein.
Neighbouring districts are the Hessian districts of Limburg-Weilburg, Hochtaunuskreis, Main-Taunus-Kreis, district-free Wiesbaden and Mainz-Bingen and Rhein-Lahn which are located in Rhineland-Palatinate.
Wikipedia https://en.wikipedia.org/wiki/Rheingau-Taunus-Kreis
Coordinates 50°8'30.852" N 8°4'51.63" E