Zarrin Shahr (Persian: زرين شهر, also Romanized as Zarrīn Shahr; also known as Qal‘eh Rīz, Rīz-e Lanjān, and Rīz) is a city in and the capital of Lenjan County, Isfahan Province, Iran. At the 2006 census, its population was 55,984, in 15,154 families. It is located in southwest of Isfahan.