Borujen (Persian: بروجن)[a] is a city in the Central District of Borujen County, Chaharmahal and Bakhtiari province, Iran, serving as capital of both the county and the district.

[5] The city is populated by Persians with a minority of Lurs and Turkic peoples.

[3] The city is located in a valley with the same name, which has a total area of 580 m2 in the eastern part of Chaharmahal and Bakhtiari province.

Its climate is usually a combination of moderate summers and very cold winters.

Average annual precipitation is 243 mm (24% in the spring, 1% in the summer, 33% in the fall, and 44% in the winter).