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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.