You can start with this website http://nigeria.usembassy.gov/ A letter of invitation is usually advised. They may also need to show strong ties to their country, such as family, a job, home, a bank account.
Quick Answer. Over one billion Muslims live in Asia, which makes it the continent with the highest Muslim population. Indonesia is the country with the largest Muslim population, with 209 million people. Continue Reading.
The United States host the largest Muslim population in North America with 2.7 million or 0.9%, While Canada host about one million Muslim or 3.2% of the population. While in Mexico there were 3,700 Muslims in the country.