Muscle Shoals, AL has a population of 13,585 and is the 3,076th largest city in the United States. The population density is 822 per sq mi which is 747% higher than the Alabama average and 807% higher than the national average. The median age in Muscle Shoals is 41 which is approximately 7% higher than the Alabama average of 39. In Muscle Shoals, 61% of the population over 15 years of age are married, 99% speak English and 1% speak Spanish. 80% of Muscle Shoals residents were born in Alabama, 19% were born out of state, 1% were born outside of the United States and 1% were foreign born.