North Bethesda, MD has a population of 49,971 and is the 817th largest city in the United States. The population density is 5,635 per sq mi which is 1088% higher than the Maryland average and 6120% higher than the national average. The median age in North Bethesda is 39 which is approximately 2% higher than the Maryland average of 38. In North Bethesda, 55% of the population over 15 years of age are married, 60% speak English and 14% speak Spanish. 18% of North Bethesda residents were born in Maryland, 46% were born out of state, 2% were born outside of the United States and 34% were foreign born.