▁and ▁most ▁dens ely ▁populated ▁regions ▁of ▁Iran . ▁Many ▁of ▁these ▁various ▁lingu istic , ▁religious , ▁and ▁trib al ▁minor ity ▁groups , ▁and ▁A zer is ▁themselves ▁have ▁settled ▁widely ▁outside ▁the ▁region . ▁The ▁majority ▁A zer is ▁are ▁follow ers ▁of ▁Sh i ' a ▁Islam . ▁The ▁Iran ian ▁A zer is ▁mainly ▁res ide ▁in ▁the ▁north west ▁provinces , ▁including ▁the ▁Iran ian ▁A zer ba ij an ▁provinces ▁( E ast ▁A zer ba ij an , ▁West ▁A zer ba ij an ▁and ▁Ar d abil ), ▁Z an jan , ▁as ▁well ▁as ▁regions ▁of ▁the ▁North ▁to ▁Ham ad an ▁County ▁and ▁Sh ara ▁District ▁in ▁the ▁East ▁Ham ad an ▁Province , ▁some ▁regions ▁Q az vin ▁Province ▁and ▁also ▁A zer ba ij ani ▁minor ities ▁living ▁in ▁Mark azi , ▁K ord est an , ▁Gil an ▁and ▁K erm ans h ah . ▁ ▁Sm aller ▁groups , ▁such ▁as ▁Armen ians , ▁Ass y ri ans , ▁Kur ds , ▁T ats , ▁Tal y sh s , ▁Jews , ▁Circ ass ians , ▁( and ▁other ▁Pe op les ▁of ▁the ▁C au cas us ), ▁and ▁Pers ians ▁also ▁inhab it ▁the ▁region . ▁ ▁Religion ▁The ▁majority ▁of ▁A zer ba ij an is ▁in ▁A zer ba ij an ▁are ▁follow ers ▁of ▁Tw el ver ▁Sh ia ▁Islam . ▁A zer ba ij an is ▁comm emor ate ▁Sh ia ▁holy