Lake Arbor, MD has a population of 10,380 and is the 3,843rd largest city in the United States. The population density is 3,312 per sq mi which is 598% higher than the Maryland average and 3555% higher than the national average. The median age in Lake Arbor is 40 which is approximately 3% higher than the Maryland average of 38. In Lake Arbor, 40% of the population over 15 years of age are married, 89% speak English and 2% speak Spanish. 27% of Lake Arbor residents were born in Maryland, 61% were born out of state, 1% were born outside of the United States and 11% were foreign born.