COUNTY · VA

Prince William County, Virginia

Prince William County is a county in Virginia with FIPS code 51153 and an estimated population of 489,640 (Census 2023), 2nd largest of 133 in the state.

County facts

Name: Prince William County
State: Virginia
Type: county
FIPS code: 51153
State FIPS: 51
Population (2023): 489,640
Change since 2020: +1.4%
State rank: 2 of 133

Population is the Census Bureau’s Vintage 2023 estimate.

Other counties in Virginia

Fairfax County Virginia Beach city Loudoun County Chesterfield County Henrico County Chesapeake city Arlington County Norfolk city All 133

Questions

What is the FIPS code for Prince William County?

Prince William County, Virginia has the five-digit FIPS code 51153: 51 for the state and 153 for the county.

What state is Prince William County in?

Prince William County is in Virginia.

How do I know if an address is in this county?

Use the address lookup. ZIP codes and city names can cross county lines, so an address is the reliable check.

Sources: U.S. Census Bureau geographic reference files; Census Bureau Population Estimates, Vintage 2023. Last reviewed 2026-10-27.