Khorramdarreh (Persian: خرمدره) is a city in the Central District of Khorramdarreh County, Zanjan province, Iran, and serves as capital of both the county and the district. The city has highest literacy rate in Zanjan province.
Khorramdarreh is home of Minoo Industrial Group (Food Holding) which was founded by Ali Khosroshahi, grandfather of Dara Khosroshahi. The people of Khorramdarreh are mainly active in the agriculture sector. Khorramdarreh has an industrial estate located near the Qazvin–Zanjan highway.