Khalkhal (Azerbaijani: خالخال, Khālkhāl)، formerly and local, Herowabad, Azerbaijani: هیرو، Hirow, Persian: هروآباد‎, also Romanized as Khalkhāl; formerly, Herowabad also Romanized as Herowābād, Harowabad, Herauabad, Heroābād, and Hirābād; also formerly, Herow, also Romanized as Harau and Herau) is a city in and the capital of Khalkhal County, in Ardabil Province, modern Iran and in the eastern part of historical Azerbaijan platuea.