Fars Province (fɑrs; استان فارس, Ostân-e Fârs, ˈfɒː(ɾ)s), also known as Pars Province (استان پارس, Ostân-e Pârs) as well as Persis (the origin of the name "Persia"), is one of the 31 provinces of Iran. With an area of 122,400 km2, it is located in Iran's southwest, in Region 2, and its administrative center is Shiraz. Fars province neighbours Bushehr province to the west, Hormozgan province to the south, Kerman and Yazd provinces to the east, Isfahan province to the north, and Kohgiluyeh and Boyer-Ahmad province to the northwest.
At the 2006 census, the province numbered 4,220,721 people in 1,014,690 households. As of the following census in 2011, Fars had a population of 4,596,658 people in 1,250,135 households, of whom 67.6% were registered as urban dwellers (urban/suburbs), 32.1% villagers (small town/rural), and 0.3% nomad tribes. The most recent census in 2016 counted 4,851,274 people in 1,443,027 households.
Fars is the historical homeland of the Persian people. It was the homeland of the Achaemenid and Sasanian Persian dynasties of Iran, who reigned on the throne by the time of the ancient Persian Empires. The ruins of the Achaemenid capitals Pasargadae and Persepolis, among others, demonstrate the ancient history of the region. Due to the historical importance of this region, the entire country has historically been also referred to as Persia in the West. Prior to Arab rule, this region was known as Pars.
The Persian word Fârs (فارس) is the Arabized form of the earlier form Pârs (پارس), which is in turn derived from Pârsâ (𐎱𐎠𐎼𐎿), the Old Persian name for the Persis region. The names Parsa and Persia originate from this region.