The Hexi Corridor (Chinese: 河西走廊; pinyin: Héxī Zǒuláng; Wade–Giles: Ho2-hsi1 Tsou3-lang2, Xiao'erjing: حْسِ ظِوْلاْ, Mandarin pronunciation: [xɤ˧˥ɕi˥ tsoʊ˨˩˦lɑŋ˧˥]), also known as the Gansu Corridor, is an important historical region located in the modern western Gansu province of China. It refers to a narrow stretch of traversable and relatively arable plain west of the Yellow River's Ordos Loop (hence the name Hexi, meaning "west of the river"), flanked between the much more elevated and inhospitable terrains of the Mongolian and Tibetan Plateaus.

Gansu is an inland province in Northwestern China. Its capital and largest city is Lanzhou, in the southeast part of the province.