Nain (Persian: نایین or نائين‎, also Romanized as Nā’īn & Nāeyn) is a city and capital of Nain County, Isfahan Province, Iran. At the 2011 census, its population was 25,379 in 7,730 families. Na’in (also known as Naein and Naeen) lies 170 km north of Yazd and 140 km east of Esfahan with an area of almost 35,000 km², Na’in lies at an altitude of 1545 m above sea level. Like much of the Iranian plateau, it has a desert climate, with a maximum temperature of 41 °C in summer, and a minimum of -9 °C in winter. It extensively uses ab anbars. Nain is most famous in the world for its rugs.