Sankt Goar-Oberwesel is a former Verbandsgemeinde in the Rhein-Hunsrück district, in Rhineland-Palatinate, Germany. It is situated on the left bank of the Rhine, approx. 30 km southeast of Koblenz. Its seat was in Oberwesel. On 1 January 2020 it was merged into the new Verbandsgemeinde Hunsrück-Mittelrhein.