Addinin jihar Zamfara na Najeriya ya fi musulunci . Sharia tana aiki a duk fadin jihar. Babu wata diocese ta Roman Katolika da ke da wurin zama a cikin jihar. A ranar 28 ga watan Oktoban shekarar 1999 ne jihar Zamfara ta ayyana Shari’ar Musulunci a matsayin dokar da za ta tafiyar da jihar. Gwamnan jihar Zamfara na lokacin Ahmed Sani Yerima ne ya yi. Shari'a ita ce ka'idar shari'a ta Musulunci wadda tsawon shekaru aru-aru ta samar da cikakkiyar jagora ga rayuwa ga musulmi. Sai dai hujjar ita ce, an sanya Najeriya a matsayin ta daya tsakanin Kirista da Musulmi don haka abin da ya shafi kafa dokar ya yi illa ga wadanda ba Musulmi ba. An yi la’akari da batun halalcinta kamar yadda ake ganin ya sabawa kundin tsarin mulkin kasar.