In what country do Shi'ite Muslims constitute the great majority of the population?

Answer 1

Iran. Shiite Muslims constitute the great majority of Iran (~ 66-70 million Shia that constitute 90-95 % of Iran total population and 37-40 % of world Shia population).

Through population census the two countries with majority Shiite Muslims are Iran and Iraq.

Answer 2

Twelver shia Muslims live in many countries. Iran is the main Shia county and the leader of Shia Islam in world. Twelver Shia Islam constitute the majority of the population in Iran (90%), Azerbaijan (75%), Bahrain (70%), Lebanon (65% of Muslims) and Iraq (65%), Yemen (45%). Other countries with a significant proportion of Shia are Syria (15%), Kuwait (35%), Pakistan (20%), India (23% of Muslims), Afghanistan (15%), Saudi Arabia (18%), Turkey (20%), United Arab Emirates (16%), Qatar (15%), Albania(25%).

other Muslim countries are mainly sunni with minor shia population. Qum in Iran and Najaf in iraq are two main city of Shia Islam.

See Discussion area