Chadegan is a city in and the capital of Chadegan County, in western Isfahan Province, Iran. At the 2006 census, its population was 7,037, in 1,872 families. Chadegan Reservoir on the Zayandeh Rood river is the largest in Isfahan Province. It was formed in 1972 by the Zayandeh Rood Dam. The dam was initially named Shah Abbas Dam after Shah Abbas I, the most influential king of the Safavid dynasty, but it was changed to Zayandeh Rood Dam after the Islamic revolution in 1979. Since 1972, the Chadegan Reservoir has helped prevent seasonal flooding of the Zayandeh Rood River.

There are so many villas around the lake of this city & a place for so many Isfahanians who spend their weekend there.