Carbon Hill, AL has a population of 1,739 and is the 11,849th largest city in the United States. The population density is 316 per sq mi which is 244% higher than the Alabama average and 249% higher than the national average. The median age in Carbon Hill is 40 which is approximately 3% higher than the Alabama average of 39. In Carbon Hill, 52% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 84% of Carbon Hill residents were born in Alabama, 15% were born out of state, 0% were born outside of the United States and 1% were foreign born.