About IRAN Government type Islamic Republic Capital Tehran Administrative divisions There are 28 provinces (or 28 ostanha; singular-ostan): Ardabil, Azarbayjan-e Gharbi, Azarbayjan-e Sharqi, Bushehr, Chahar Mahall va Bakhtiari, Esfahan, Fars, Gilan, Golestan,Hamadan, Hormozgan, Ilam, Kerman, Kermanshahan, Khorasan, Khuzestan, Kohkiluyeh va Buyer Ahmadi, Kordestan, Lorestan, Markazi, Mazandaran, Qazvin, Qom, Semnan, Sistan va Baluchestan,Tehran, Yazd and Zanjan...