Ashburn, VA has a population of 49,692 and is the 824th largest city in the United States. The population density is 2,893 per sq mi which is 1412% higher than the Virginia average and 3093% higher than the national average. The median age in Ashburn is 35 which is approximately 7% lower than the Virginia average of 38. In Ashburn, 64% of the population over 15 years of age are married, 71% speak English and 10% speak Spanish. 32% of Ashburn residents were born in Virginia, 43% were born out of state, 2% were born outside of the United States and 23% were foreign born.