Huntsville, AL has a population of 184,132 and is the 129th largest city in the United States. The population density is 867 per sq mi which is 818% higher than the Alabama average and 857% higher than the national average. The median age in Huntsville is 37 which is approximately 4% lower than the Alabama average of 38. In Huntsville, 51% of the population over 15 years of age are married, 92% speak English and 4% speak Spanish. 54% of Huntsville residents were born in Alabama, 37% were born out of state, 2% were born outside of the United States and 7% were foreign born.