There are almost 50 Countries where Muslims are in Majority while in other Countries they are living in Minority. Around 20% Muslim population is living in Arab Countries such are Saudi Arabia, UAE, Egypt. Most Populated Muslim Country in the World is Indonesia that is having population of 228,582,000 while Pakistan stands second that has population of 172,800,000. If we see Military power Pakistan is at top. It is also the only Muslim country that has Nuclear weapons. Here are some big Muslim countries.