Mount Olive, AL has a population of 4,237 and is the 7,179th largest city in the United States. The population density is 460 per sq mi which is 400% higher than the Alabama average and 407% higher than the national average. The median age in Mount Olive is 40 which is approximately 3% higher than the Alabama average of 39. In Mount Olive, 66% of the population over 15 years of age are married, 97% speak English and 1% speak Spanish. 86% of Mount Olive residents were born in Alabama, 12% were born out of state, 0% were born outside of the United States and 1% were foreign born.