Kushk District is situated in the northern part of Herat Province, Afghanistan and may also may be referred to as Rubat-i-Sangin or Rabat-e-Sangi. It borders Turkmenistan to the north, Gulran District to the west, Zinda Jan District, Injil District and Karukh District to the south and Kushki Kuhna District to the east. The population is 91,700 (2005). The district center is Kushk.
The main road from Herat to Kushka in Turkmenistan passes through the district, along the Kushk River. Towraghondi is the main border crossing town.