Robertsdale, AL has a population of 5,776 and is the 5,893rd largest city in the United States. The population density is 1,059 per sq mi which is 1052% higher than the Alabama average and 1069% higher than the national average. The median age in Robertsdale is 35 which is approximately 9% lower than the Alabama average of 39. In Robertsdale, 57% of the population over 15 years of age are married, 90% speak English and 9% speak Spanish. 56% of Robertsdale residents were born in Alabama, 38% were born out of state, 0% were born outside of the United States and 6% were foreign born.