Mustang is one of the northernmost districts in Nepal. Most of it is in the rain shadow of the high Himalaya Mountains, therefore, it has a paucity of rainfall. A mosquito survey of the district resulted in collecting 10 species, four in the genus Aedes, five in the genus Culex and one in the genus Anopheles. The climate and collecting sites are described. Breeding was found up to 3738 m.