Ellicott City, MD has a population of 70,780 and is the 515th largest city in the United States. The population density is 2,362 per sq mi which is 398% higher than the Maryland average and 2507% higher than the national average. The median age in Ellicott City is 41 which is approximately 8% higher than the Maryland average of 38. In Ellicott City, 70% of the population over 15 years of age are married, 71% speak English and 2% speak Spanish. 40% of Ellicott City residents were born in Maryland, 34% were born out of state, 2% were born outside of the United States and 25% were foreign born.