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.
Looking ahead, the Center estimates that by 2050 the number of Muslims worldwide will grow to 2.76 billion, or 29.7% of worldâs population. The share of the worldâs Muslims who live in sub-Saharan Africa will increase from 15.5% in 2010 to 24.3%.