Mountain Lake Park, MD has a population of 2,298 and is the 10,264th largest city in the United States. The population density is 1,200 per sq mi which is 153% higher than the Maryland average and 1224% higher than the national average. The median age in Mountain Lake Park is 41 which is approximately 6% higher than the Maryland average of 38. In Mountain Lake Park, 58% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 64% of Mountain Lake Park residents were born in Maryland, 35% were born out of state, 0% were born outside of the United States and 1% were foreign born.