Mapleville, MD has a population of 247 and is the 23,477th largest city in the United States. The population density is 612 per sq mi which is 29% higher than the Maryland average and 576% higher than the national average. The median age in Mapleville is 56 which is approximately 46% higher than the Maryland average of 38. In Mapleville, 100% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 47% of Mapleville residents were born in Maryland, 47% were born out of state, 6% were born outside of the United States and 0% were foreign born.