Cities with the largest Muslim Population: 1st – New York City with 69,985 Muslims 2nd – Dearborn, MI (29,181) 3rd – Philadelphia (30.000 – 50,000) 4th – Los Angeles (25,673) Note: The Arab population of Dearborn is 30% of its total population of 98,000! This is the largest concentration of Muslims in the United States.