Yasuj (Persian: ياسوج; also Romanized as Yāsūj, Yasooj, and Yesūj; Lurish: یاسووج or یاسیچ - Jasuc and Jasyç) is a city in and the capital of Kohgiluyeh and Boyer-Ahmad Province, Iran. At the 2006 census, its population was 96,786, in 20,297 families.
Yasuj is an industrial city in the Zagros Mountains of southwestern Iran. The term "Yasuj" is also used to refer to the entire region.
Yasuj has both a sugar processing plant and a coal-burning powerplant that generates electricity for the area.
The people of Yasuj speak Lurish, one of the western Iranian languages.
The area of Yasuj has been settled since as early as the Bronze Age. Findings include the Martyrs Hills (dating from 3rd millennium BC), the Khosravi Hill from the Achaemenian period, the ancient site of Gerd, the Pataveh bridge, and the Pay-e Chol cemetery. Yasuj is the place where Alexander III of Macedon and his Macedonian forces stormed the Persian Gates ("Darvazeh-ye Fars"), and fought themselves a way into the Persian heartland (331 BC).