Sankt Goar lies on the Rhine Gorge, the narrow gap on the Rhine through the Rhenish Massif. The part of the gorge on the left bank is the edge of the Hunsr�ck, facing which on the right bank is the edge of the Taunus. The characteristic narrow-valley form came into being through downcutting in a massif that was undergoing an uplift.
The nearest major places are the city of Koblenz, some 24 km to the north, and the town of Bingen am Rhein, some 25 km to the southeast, in both cases as the crow flies. Sankt Goar is linked by the F�hre Loreley (�Loreley Ferry�) with its sister town of Sankt Goarshausen directly across the Rhine. The Rhine�s breadth here is roughly 250 m.
In Sankt Goar, the Gr�ndelbach, flowing from the Hunsr�ck, empties into the Rhine.
The town is made up of several Stadtteile, the main centre on the Rhine, also called Sankt Goar, two centres up on the heights, Biebernheim and Werlau, and two further centres on the Rhine, Fellen to the north and �An der Loreley� to the south
