Milton, DE has a population of 2,756 and is the 9,234th largest city in the United States. The population density is 1,539 per sq mi which is 318% higher than the Delaware average and 1598% higher than the national average. The median age in Milton is 46 which is approximately 16% higher than the Delaware average of 40. In Milton, 48% of the population over 15 years of age are married, 94% speak English and 4% speak Spanish. 41% of Milton residents were born in Delaware, 53% were born out of state, 2% were born outside of the United States and 4% were foreign born.