1- Statistics of the " Ahlulbayt (a.s) World Assembly " of Shiites of the United States of America in 2008
Region: North America
Country population: 296,500,000
Shiite population: 2,300,000
Approximate percentage of Shiites in relation to the country's population: 0.8%
2- Statistics of the Association of Religion and Social Life " Pew Research Center " of Shiites in United States of America – 2009
Country population: 307,660,000
Muslim population: 2,454,000
Shiite population: 368,000 - 245,000
Percentage of Shiites in relation to the Muslim population of the country: 10-15%