Leeds, AL has a population of 11,701 and is the 3,485th largest city in the United States. The population density is 520 per sq mi which is 466% higher than the Alabama average and 474% higher than the national average. The median age in Leeds is 39 which is approximately 2% higher than the Alabama average of 39. In Leeds, 65% of the population over 15 years of age are married, 91% speak English and 8% speak Spanish. 71% of Leeds residents were born in Alabama, 22% were born out of state, 1% were born outside of the United States and 6% were foreign born.