Alpgau
{{short description|German place}}
{{coord|47.721|8.176|display=title}}
Alpgau (also Albgau) was a territory of Alemannia and the Duchy of Swabia during the 8th to 12th centuries.[http://www.hls-dhs-dss.ch/textes/d/D7020.php] {{in lang|de}}
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.