Nahavand (Persian: نهاوند) is a city in the Central District of Nahavand County, Hamadan province, Iran, serving as capital of both the county and the district. It is south of the city of Hamadan, west of Malayer and northwest of Borujerd.
Inhabited continuously since prehistoric times, Nahavand was bestowed upon the House of Karen in the Sasanian period. During the Muslim conquest of Persia, it was the site of the famous Battle of Nahavand.