Fasa is a city in the province of Fars in Iran. It had an estimated population of 191,017 in 2006.

Fars is one of the 30 provinces of Iran. It is in the south of the country and its center is Shiraz. It has an area of 122,400 km square. In 1996, this province had a population of 3.8 million people, of which 56.7% were registered as urban dwellers, 41.0% villagers, and 1.4% nomad tribes.