Golpayegan (Persian: گلپایگان)) is a city in the Central District of Golpayegan County, Isfahan province, Iran, serving as capital of both the county and the district. The city is 186 kilometres (116 mi) northwest of Isfahan and 102 kilometres (63 mi) southeast of Arak, at an altitude of 1,830 m. Its temperature fluctuates between +37 and -10 °C. Its average annual rainfall is 300 mm.