Brambleton, VA has a population of 17,063 and is the 2,511th largest city in the United States. The population density is 2,966 per sq mi which is 1450% higher than the Virginia average and 3174% higher than the national average. The median age in Brambleton is 34 which is approximately 10% lower than the Virginia average of 38. In Brambleton, 74% of the population over 15 years of age are married, 67% speak English and 5% speak Spanish. 34% of Brambleton residents were born in Virginia, 38% were born out of state, 3% were born outside of the United States and 25% were foreign born.