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The 2000 Census showed that Prince William County had a population of 280,813 people. This represented 3.97% of the total population of Virginia, making it the state's 2nd most populous county (out of 134 counties).

From the Census Estimates for 2009<1>, Prince William had a population of 379,166 people. This is an increase of 35.02% since the 2000 Census.

The following table shows the recent changes in population. Other than 2000, the population counts have been estimated by the Census Bureau.

Since 2000
Year-to-Year Change
2010402,002+43.16%+6.02% since 2009
2009379,166+35.02%+3.57% since 2008
2008366,092+30.37%+1.52% since 2007
2007360,610+28.42%+2.21% since 2006
2006352,828+25.65%+2.02% since 2005
2005345,852+23.16%+3.61% since 2004
2004333,786+18.86%+3.81% since 2003
2003321,537+14.5%+3.71% since 2002
2002310,048+10.41%+4.13% since 2001
2001297,738+6.03%+6.03% since 2000
2000280,813The Last Census

Prince William County had 98,052 Housing Units<2> at the time of the 2000 Census.

The 2000 Census shows that Prince William County has a total area<3> of 348.4 square miles [902 km²]. Of this total, 337.8 square miles [874 km²] of the area is land, with the balance (3.04%) being water (10.58 square miles [27.4 km²]).

Using the above population and land area values, Prince William County had a population density of 831 people per square mile [321 people/km²], making it the state's 4th most densely populated county (out of 134 counties).

US Census QuickFacts

The Census Bureau has created documents containing demographic information that are called QuickFacts. A QuickFact that is specific to Prince William County is available. The QuickFact also contains a comparison between Prince William and the state of Virginia.

Click here for the Prince William County QuickFact (QF-51153).

Below are some of the communities that are located in Prince William County:

(2009 Est)
(2000 Census)
Change in

Below are the counties that adjoin and form the boundaries of Prince William County. A link to their specific Census QuickFact has been provided.

(2009 Est.)
(2000 Census)
Change in
FairfaxQF-51059   NE1,037,605969,7497%
FauquierQF-51061   W68,01055,13923.34%
LoudounQF-51107   N301,171169,59977.58%
StaffordQF-51179   S124,16692,44634.31%

Other Roadside Stops ...

About Virginia

Visit our Community Index for Virginia

Off-the-Road Links ...

U.S. Census Bureau
Census QuickFact for Prince William County

Footnotes ...

<1>On a yearly basis, the US Census Bureau creates an estimate of the county's population. Keep in mind that this is an estimate and not an actual count. The last physical count was the 2000 Census and the next count will be for the 2010 Census.

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<2>A Housing Unit is a broad term for those places where people live (whether occupied or temporarily vacant), such as a house, an apartment, a mobile home, or an area that is considered as a separate living quarter. Separate living quarters (consisting of one or more rooms) are considered to be those places where people live, sleep and eat separately from others and that have access to the outside (either directly or by a shared hallway).

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<3>The area value has been supplied by the US Census Bureau and it can be different than the geographic boundaries of Prince William. The value given by the Census Bureau reflects their statistical (or sampling) requirements.

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<4>All Quarter-dollar coin images from the United States Mint.

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