Ernstville, MD has a population of 14 and is the 28,890th largest city in the United States. The population density is 94 per sq mi which is 80% lower than the Maryland average and 4% higher than the national average. The median age in Ernstville is 0 which is approximately 100% lower than the Maryland average of 38. In Ernstville, 100% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 100% of Ernstville residents were born in Maryland, 0% were born out of state, 0% were born outside of the United States and 0% were foreign born.