47°43′16″N 8°10′34″E / 47.721°N 8.176°E / 47.721; 8.176 Alpgau (also Albgau) was a territory of Alemannia and the Duchy of Swabia during the 8th to 12th centuries.1 It comprised St. Blaise in what is now the Waldshut district of Baden-Württemberg.
It is not to be confused with Alpengau, now known as Allgäu.