- Fasa is a city in Fars Province, Iran. It is located about 160 kilometers southwest of the provincial capital, Shiraz. Fasa has a population of approximately 116,000 people. The city is known for its agricultural activities, particularly the production of fruits and vegetables. The historical Khorramabad Mosque is one of the main attractions in Fasa, along with several other historical sites and traditional bazaars. Fasa also has a local university and a number of schools and educational institutions.