Brock Hall, MD has a population of 10,594 and is the 3,774th largest city in the United States. The population density is 778 per sq mi which is 24% higher than the Maryland average and 759% higher than the national average. The median age in Brock Hall is 39 which is approximately 1% higher than the Maryland average of 38. In Brock Hall, 57% of the population over 15 years of age are married, 88% speak English and 2% speak Spanish. 27% of Brock Hall residents were born in Maryland, 59% were born out of state, 2% were born outside of the United States and 11% were foreign born.