1- Statistics of "Imam Hussein (AS) Encyclopedia" of Shiites of Tanzania - 2000
Country population: 31,962,769 people
Percentage of Shiites in relation to the country's population: 7%
2- Statistics of the "Ahlulbayt (a.s) World Assembly "of Shiites in Tanzania - 2008
Country population: 36,500,000 people
Shiite population: 1,095,000
Approximate percentage of Shiites in relation to the country's population: 3%
3-Statistics of the Association of Religion and Social Life " Pew Research Center " of Shiites in Tanzania - 2009
Country population: 40,849,133 people
Muslim population: 13,218,000
Shiite population: less than 1,322,000
Percentage of Shiites in relation to the country's population: 10%