Tanamoust is located at the bottom of Erg Chebbi, a Saharan erg in southeast Morocco near the Algerian border.

It most famous well known nearby village is Merzouga. Other villages around the dunes are Hassilabied, Takoujt, Khamlia and Tisserdmine.

31°04′04″N 4°01′02″W / 31.0678°N 4.0173°W / 31.0678; -4.0173