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.
1. Muslims live in the Middle East. Most Muslims (one billion) live in Asia, predominately in south and southeast Asia. More than 300 million Muslims live in Sub-Saharan Africa as well. The four largest Muslim populations are in Indonesia, Pakistan, India, and Bangladesh, each home to more than 100 million Muslims.