Marydel, MD has a population of 276 and is the 22,901st largest city in the United States. The population density is 2,334 per sq mi which is 392% higher than the Maryland average and 2476% higher than the national average. The median age in Marydel is 34 which is approximately 12% lower than the Maryland average of 38. In Marydel, 54% of the population over 15 years of age are married, 51% speak English and 48% speak Spanish. 30% of Marydel residents were born in Maryland, 26% were born out of state, 0% were born outside of the United States and 43% were foreign born.