Gaschurn-Partenen is a municipality in the district of Bludenz in the westernmost Austrian state of Vorarlberg. The two largest villages are Gaschurn Dorf (population 1083 as of 1.1.2020) and Partenen (population 376 as of 1.1.2020).

The center of Gaschurn lies 979 m above sea level. It is located in the Montafon valley between Gortipohl and Partenen (the latter belonging to the municipality of Gaschurn). 12.7 percent of the municipal area is forested, and 51.7 percent are alpine.

The river Ill runs through the community.