Prince William County Flag

Prince William County

State:
Virginia
County Seat:
Manassas

Prince William County's estimated 2026 population is 507,580 with a growth rate of 0.92% in the past year according to the most recent United States census data. Prince William County is the 2nd largest county in Virginia. The 2010 population was 406,183 and has seen a growth of 24.96% since that time.

507,580
Total Population
1,515
Population Density (mi²)
2
Population Rank (State)
4.6K 0.92%
Annual Population Growth

Prince William County Population

Demographics

Economics and Income Statistics