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Annual Population Estimates


Pop Estimate Chart-January 2021.jpg
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Notes: Population numbers from 1980 to 2010 are from the U.S. Census decennial counts. Three-decade population projections are produced in conjunction with COG (Metropolitan Washington Council of Governments) every 2-3 years using their methods and are subject to change with real estate market and economic fluctuations as well as with local planning and land use policy changes. The Weldon Cooper Center for Public Service's Demographics Research Group at the University of Virginia produces annual population estimates for all Virginia jurisdictions. Prince William County Department of Information Technology's Geospatial Technology Services produces quarterly population estimates based on up-to-date data on average household size, occupancy rates, and housing unit types. ACS = Census Bureau's American Community Survey; PEP = Census Bureau's Population Estimates Program.  

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MWCOG Forecasts: 9.1

YearPopulationHouseholdsAt-Place Employment

Source: Metropolitan Washington Council of Governments (MWCOG) 9.1 Cooperative Forecasts for Prince William County. October 2018. For more information and data on other jurisdictions, see MWCOG's Cooperative Forecasts page.


Annual Population Estimates

 PopulationHousing UnitsHouseholdsSource
1990215,68674,75970,253U.S. Census 1990
1991220,62676,53171,522PWC Office of Information Technology
1992225,73578,35373,208PWC Office of Information Technology
1993231,53780,49474,923PWC Office of Information Technology
1994240,23782,91477,181PWC Office of Information Technology
1995246,59585,18379,273PWC Office of Information Technology
1996253,48787,65081,540PWC Office of Information Technology
1997260,31390,05283,743PWC Office of Information Technology
1998268,89493,05386,609PWC Office of Information Technology
1999277,35996,02389,394PWC Office of Information Technology
2000280,81398,05294,570U.S. Census 2000
2001294,798102,81099,154PWC Office of Information Technology
2002309,351107,798103,941PWC Office of Information Technology
2003321,570111,945107,925PWC Office of Information Technology
2004336,820117,195113,035PWC Office of Information Technology
2005354,383123,379118,946PWC Office of Information Technology
2006371,178129,703122,335PWC Office of Information Technology
2007381,221132,656122,984PWC Office of Information Technology
2008388,269134,487125,406PWC Office of Information Technology
2009392,900136,550127,445PWC Finance Office
2010402,002137,115130,785U.S. Census 2010
2011410,454140,708135,733PWC Finance Office/ Revision: PWC DoIT: GTS
2012418,107142,365137,283PWC Finance Office/ Revision: PWC DoIT: GTS
2013425,681144,005138,817PWC Finance Office/ Revision: PWC DoIT: GTS
2014433,624145,725140,425PWC Finance Office/ Revision: PWC DoIT: GTS
2015441,627147,459142,047PWC Finance Office/ Revision: PWC DoIT: GTS
2016449,864149,243143,716PWC Finance Office/ Revision: PWC DoIT: GTS
2017456,126151,389145,540PWC DoIT: Geospatial Technology Services
2018459,966153,595147,348PWC DoIT: Geospatial Technology Services
2019 463,867 155,610 149,086PWC DoIT: Geospatial Technology Services
2020467,935157,305150,617DoIT GTS (2020 Census value posted here when available)

Notes: The 2017 estimates were revised in April 2018 based on a 2018 quarter 1 estimate of 458,959 people. The revision to the 2011-2016 annual estimates (bold numbers) took place in February of 2017 along with the revision of the quarterly estimates from 2010-2016. DoIT = Department of Information Technology. Revisions to 2018 and 2019 estimates took place in March 2020 with the inclusion of new occupancy and average household size estimates as well as new average household sizes for all age-restricted housing units starting in 2019 Quarter 4. The annual estimates are derived from each year's quarter 2 population estimate. For the methods used to apply the revisions, click here.


Annual Population Estimates by Magisterial District - As of Quarter 4, 2020 (12/31/2020)

  Housing Unit Types  
Square MilesSingle-Family DetachedSingle-Family AttachedMulti-FamilyTotal Housing UnitsPopulation Estimate 12/31/2019Population Density (estimate)

Notes: Single-Family Detached units include mobile homes; Single-Family Attached units include townhomes and rowhomes. Multi-Family units include apartments and condominiums; These population estimates include those living in group quarters (such as military bases, university housing, assisted living, nursing homes, group homes, shelters, mental hospitals, and correctional facilities). Percentages may not add up to 100 due to rounding. Important: The above totals will not add up to the county population and housing estimates for the same period due to slightly different methods and data sources used for the automation of population estimates for small geographies such as magisterial districts.


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