Firuzkuh (Persian: فیروزکوه, also Romanized as Fīrūzkūh and Fīrūz Kūh; Tabarian: Pirezcow; also known as Qaşabeh-ye Fīrūz Kūh) is a city in and the capital of Firuzkuh County, Tehran Province, Iran. At the 2006 census, its population was 15,807, in 4,334 families.
It is located north-east of Tehran, in the middle of Alborz Mountains. Previously, it was part of Mazandaran Province.
The city has a relatively cool and windy climate. It has some natural attractions and is famous for them, including Tange Vashi, Boornic Cave, Roodafshan Cave, Gardane Gadook and the sight-seeing of villages like Varse-Kharan, Zarrin Dasht, Darreh-Deh, and Kaveh Deh.
Firuzkuh is rich in historical heritage and some of the most ancient objects in Tehran Province have been found there. Among its villages Darreh-Deh contains the most ancient places. During the reign of Timur, Ruy González de Clavijo praised a nearby concentric citadel and suggested that it could resist any assault. Veresk Bridge lies on the road north from Firuzkuh.