Answer 1
There is no exact number, as the United States census does not collect information on religion, but estimates range from anywhere starting at 1.5 million and ending at 7 million.
Answer 2
In both Americas, Muslims are 0.5% of total population and 0.3 % of total Muslim Population. Total Muslims in the Americas there are 4.46 millions of Muslims. In USA only, there are 2.5 million Muslims (~0.8 % of USA total population). This is according to Pew Forum studies as of October 2009. See related link.
Around 23% of world population are Muslims and in the Americas 0.5 % (in USA 0.8%). Refer to link below
The Muslims percentage in US is ~2.5 million that accounts to ~0.8% of total population (according to Pew Forum study as of October 2009).
See related link for more information.
Afghanistan is the country with the highest percentage of Muslim population.
The city of Damascus in Syria has a major percentage of muslims, and there is only a small percentage of christians there.
According to www.religionnewsblog.com there are 600,000 Muslims in Canada.
About 1% of Norway population are Muslims. This accounts for about 65000 Muslims as of Pew Forum study (Oct. 2009). see related link for more information.
In Kashmir valley, 95% of total population are Muslims.
over 90%.
9%
Around 15% of Muslims in the Middle East are Shiites.
Afghanistan is the country with the highest percentage of Muslim population.
The city of Damascus in Syria has a major percentage of muslims, and there is only a small percentage of christians there.
Iran.
1%/
There are 57 Independent Muslim countries. In the countriies like Saudi Arabia, Jordon, Egypt, Indonesia, Gulf States and Pakistan the Muslims are in dominant majority. However, according to the percentage Afghanistan has the largest estimated percentage of the Muslims, more than 99%.
Portugal
20-25%
Currently, 4.6% the second largest.
near 70%