Dorfgastein is a municipality in St. Johann im Pongau District, in the Austrian state of Salzburg.

The village itself (ze Dorff), then part of the Archbishopric of Salzburg, was first documented in the oldest Gastein mining regulations of 1342.

Temporarily held by the Bavarian counts of Ortenburg, it was acquired by the Salzburg archbishop Philip of Spanheim in 1251, whose ministeriales imposed tolls and secured the area at the valley entrance.

The surrounding estates were finally incorporated into the Archbishopric of Salzburg in 1297 with the consent of the Bavarian dukes Otto III and Stephen I.

The administrative seat was relocated to neighbouring Hofgastein, after Archbishop Leonhard von Keutschach transferred the castle to his relatives as a gift.