Chadegan (Persian: چادگان)[a] is a city in the Central District of Chadegan County, Isfahan province, Iran, serving as capital of both the county and the district.

[4] At the time of the 2006 National Census, the city's population was 7,037 in 1,872 households.

[6] The 2016 census measured the population of the city as 9,924 people in 2,927 households.

[2] Chadegan Reservoir on the Zayandeh Rood river is the largest in Isfahan province.

Since 1972, the Chadegan Reservoir has helped prevent seasonal flooding of the Zayandeh River.