Zwischbergen has an area, as of 2011, of 86.1 square kilometers (33.2 sq mi).
 Of this area, 13.1% is used for agricultural purposes, while 24.4% is forested.
 Of the rest of the land, 0.4% is settled (buildings or roads) and 62.1% is unproductive land.

The village of Gondo, on the Simplon Pass road, is located in the municipality.
Zwischbergen has an area, as of 2011, of 86.1 square kilometers (33.2 sq mi).  Of this area, 13.1% is used for agricultural purposes, while 24.4% is forested.  Of the rest of the land, 0.4% is settled (buildings or roads) and 62.1% is unproductive land.
The village of Gondo, on the Simplon Pass road, is located in the municipality.
Zwischbergen