Marbury, AL has a population of 1,989 and is the 11,052nd largest city in the United States. The population density is 86 per sq mi which is 7% lower than the Alabama average and 5% lower than the national average. The median age in Marbury is 38 which is approximately 3% lower than the Alabama average of 39. In Marbury, 54% of the population over 15 years of age are married, 93% speak English and 5% speak Spanish. 87% of Marbury residents were born in Alabama, 8% were born out of state, 2% were born outside of the United States and 3% were foreign born.