Wolf Trap, VA has a population of 16,722 and is the 2,558th largest city in the United States. The population density is 1,707 per sq mi which is 792% higher than the Virginia average and 1784% higher than the national average. The median age in Wolf Trap is 44 which is approximately 16% higher than the Virginia average of 38. In Wolf Trap, 73% of the population over 15 years of age are married, 79% speak English and 3% speak Spanish. 25% of Wolf Trap residents were born in Virginia, 55% were born out of state, 2% were born outside of the United States and 17% were foreign born.