Most of the population are Muslims. Other religious groups are also present, including more than a thousand of Jehovah’s Witnesses ​ — many of them native Azerbaijanis.
Kuigi enamik Aserbaidžaani elanikkonnast on muslimid, on esindatud ka teised religioonid, sealhulgas Jehoova tunnistajad, keda on üle tuhande ja kellest paljud on põlised aserbaidžaanlased.