Irondale, AL has a population of 12,388 and is the 3,330th largest city in the United States. The population density is 715 per sq mi which is 678% higher than the Alabama average and 690% higher than the national average. The median age in Irondale is 42 which is approximately 8% higher than the Alabama average of 39. In Irondale, 51% of the population over 15 years of age are married, 89% speak English and 9% speak Spanish. 68% of Irondale residents were born in Alabama, 24% were born out of state, 1% were born outside of the United States and 7% were foreign born.