Prince William County Flag

Prince William County

State:
Virginia
County Seat:
Manassas

Prince William County's estimated 2026 population is 507,853 with a growth rate of 1.08% 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 25.03% since that time.

507,853
Total Population
1,516
Population Density (mi²)
2
Population Rank (State)
5.4K 1.08%
Annual Population Growth

Prince William County Population

Demographics

Economics and Income Statistics