Five other municipalities are surrounding Altach, Hohenems in the Dornbirn district, Götzis and Mäder in the Feldkirch district, and Oberriet and Diepoldsau in the Swiss canton St. Gallen.
It also includes the former Imperial palace (Kaiserpfalz) at Kriessern, but not the formerly attached village of Mäder in Vorarlberg and Diepoldsau.