Milford Mill, MD has a population of 30,650 and is the 1,386th largest city in the United States. The population density is 4,413 per sq mi which is 604% higher than the Maryland average and 4771% higher than the national average. The median age in Milford Mill is 35 which is approximately 8% lower than the Maryland average of 38. In Milford Mill, 42% of the population over 15 years of age are married, 86% speak English and 5% speak Spanish. 62% of Milford Mill residents were born in Maryland, 20% were born out of state, 2% were born outside of the United States and 16% were foreign born.