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2020 Census

2020 Census Updates and Data Releases

2020 Census response rates


  • Prince William County: 77.0%  (72.1% in 2010; 73.0% in 2000)
  • Virginia: 71.5%  (69% in 2010; 72.0% in 2000)
  • United States: 67.0(66.5% in 2010; 67.0% in 2000)


  • Fredericksburg Area Census Office (ACO) reported that 99% of nonresponding households were reached within the ACO's region. Prince William is one of many jurisdictions within the ACO's reporting area.


2020 CENSUS operations and data releases


Census Bureau statement on redistricting​​The Census Bureau can provide legacy format summary redistricting data by mid-late August
​Census Bureau random sampling blog
Census Bureau confirms no major anomalies in 2020 Census data
​NBC News: Economy
Gina Raimondo, Commerce Secretary, confirmed by Senate​link
Census Bureau processing updates​​Data processing issues and a new response mode have delayed 2020 Census data delivery
​Census Bureau statement on apportionment count
​Apportionment counts to be completed by April 30, 2021
​Politico: Redistricting delays
​Lack of apportionment numbers through summer will delay 2022 House races
​NPR: Apportionment & redistricting data timeline
​Apportionment data by April 30, 2021; Redistricting data no earlier than July 30, 2021.
​Census Bureau statement on citizenship data
​Following the president's executive order, no citizenship or immigration info to be included with redist. data.
​Census Bureau statement on director's retirement
​Director Dillingham retires from his post
​Washington Post: Undocumented immigrant data
​The Bureau abandons its directive to deliver data on undocumented persons to exlude from apportionment
​Brookings: What the 2020 Census will reveal
​2020 data trends will include stagnating growth, surge in the aging population, rising racial and ethnic diversity

View all Census Bureau press releases here.

Congressional Reapportionment

The earliest date that 2020 Census data for congressional apportionment are to be delivered to the president is April 30, 2021. See press release here.

Apportionment is the process of dividing the 435 memberships, or seats, in the U.S. House of Representatives among the 50 states based on the apportionment population counts from the decennial census

(Without COVID-19 delays, the statutory deadline to provide apportionment counts would have been December 31, 2020)


Required by law, the Redistricting Data Program provides states the opportunity to specify the small geographic areas for which they wish to receive decennial population totals for the purpose of reapportionment and redistricting.

  • 2020 geographic boundary files and redistricting data (Rolling release window: Jan 19 - Feb 28, 2021)
    • See Jan 14, 2021 Census Bureau press release here.
    • Download Prince William County's 2020 Census Geographic Boundary Files (Shapefile format) here.
      • After download completes, open in a mapping software or web application
      • Includes 2010 boundary comparison files
  • Redistricting 2021
    • See presentation provided to the Board of County Supervisors on January 19, 2021.
    • The statutory deadline for release of the US Census redistricting data will be delayed from the original date of April 1, 2021. States should expect redistricting on Sept. 30, 2021.
    • In a mid-March, 2021 announcement, the Census Bureau stated that it will make legacy format summary redistricting data files available by mid-to-late August, 2021.
  • Redistricting in Prince William County: 2011
    • The PWC Board of County Supervisors began the redistricting process on March 8, 2011 when the Board publically adopted a set of redistricting criteria and timetable (May 17th deadline).
    • The redistricting procedure for reapportioning the population of Prince William County is established by Virginia Code § 24.2-304.3. Recording reapportionment ordinance.
    • Public presentations, hearings, and posting of plans were completed as the county considered a 7-district and 8-district plan based on large population growth between 2000 and 2010.
    • After all concerns were addressed, the Board approved a 7-district plan on April 18, 2011. The new districts deviated 9.2% from the mean of all district total populations as opposed to the large variations in population upon release of 2010 Census data.


The traditional disclosure avoidance techniques that we used in the 2010 Census and in the American Community Survey rely on “swapping” characteristics in the underlying data between a small subset of households in different geographic areas. In this era of Big Data, these methods are insufficient. The amount of noise required using traditional disclosure avoidance techniques would make the published data unfit for most uses. With the new method, the noise is added to the statistics in the tables themselves. This allows us to precisely control the amount of noise that we add according to privacy requirements.


OUR HIGH SELF-RESPONSE RATEs for the 2020 Census were attainable due to the GENEROUS ASSISTANCE FROM OUR 2020 OUTREACH PARTNERS LISTED BELOW, some of which distributed numerous materials to the public:

​PWC Communications Office
US Census Bureau staff
The Community Foundation for Northern Virginia​
​League of Women Voters
City of Manassas​
​Potomac Health Foundation
PWC Office of Executive Management
PWC Cooperative Council of Ministries​
PWC Dept of Economic Development​
Unity in the Community
PWC Office of Emergency Management
PWC Fire & Rescue​
​City of Manassas Park
National Korean American Service & Education Consortium
​HOLA (Hispanic Organization for Leadership and Action)
Woodbridge Workers Community​
​Comite Hispano de PW
Potomac Valley Church​
Delta Sigma Theta Sorority, Inc.: Prince William County Alumnae ChapterPrince William Chamber of Commerce
​GPW Health Center
​Francis House
Prince William County Service AuthorityOmega Psi Phi Fraternity, Inc., Pi Lambda Lambda (PLL) Chapter
Phi Beta Sigma Fraternity, Inc.: Omicron Zeta Sigma ChapterAlpha Kappa Alpha Sorority, Inc.: Omicron Chi Omega Chapter
​PW Health District
Virginia Interfaith Center for Public Policy​
​PWC Area Agency on Aging
PWC Public Library System
​​​Pathway Homes, Inc.
Project Mend-A-House
VA Coalition for Immigrant Rights
PWC Housing & Community Development​
​PWC Homeless Services Division
PWC Planning Office​
PWC Dept of Information Technology
National Alliance for Mental Illness
​PWC Human Rights Office
Tu Comunidad con Joel Martinez
​PWC Juvenile Services Division
PW Public Schools Office of Student Learning​
​PWC Public Schools Communications Office
PW Public Schools Office of School Food & Nutrition Services​
PWC Board of County Supervisors Offices​
Virginia Civic Engagement Table​
​Town of Dumfries
Various Faith-Based Groups​
​Northern Virginia Family Service
Panorama Latino​
​Faith in Public Life
Nueva Vida​
PWC Dept of Social Services

A special Thank you to those locations who permitted census bureau staff and volunteers to engage the public about the 2020 census and boost self-response rates in the PWC Area:

Big Coin Laundry

Fiesta Supermarket

Fresh World Supermarket


Holy Family Food Pantry

La Jarochita Restaurant


Prince William County Public Library System

R+B Laundromat

Supermarket Fiesta

Todos Supermarket

2020 census preparations completed

Local Update of Addresses (LUCA)                               ||||||||||||||||||||||||||||COMPLETE

  • March 2018 - July 2018: Combed through more than 150,000 residential addresses and made thousands of edits that consisted of corrections to street names, numbers, locations, and types of addresses in the Census Bureau's master address file. The completion of this process ensures that the Census Bureau will reach all households in the county for the 2020 Census.

Participant Statistical Areas Program (PSAP)           ||||||||||||||||||||||||||||COMPLETE

  • February 2019 - June 2019:  Determined Census block groups, tracts, and Census Designated Places (CDPs) that needed boundary edits due to changes in population and housing units since the last census. Block group boundaries may be edited to better align with special planning area boundaries, transportation analysis zones, and major employment centers. Sample data at the block group and tract levels are collected and released annually in the Census Bureau's American Community Survey (ACS) program.
  • August 2019 - October 2019: Assisted the Census Bureau in the identification of residential units in the county under construction as of March 2018 and anticipated for completion by Census day, April 1, 2020. This process also identifies locations of transient populations. Similar to LUCA, the completion of this task helps to ensure that everyone residing in Prince William is counted in the 2020 Census.

2020 Complete Count Committee                                ||||||||||||||||||||||||||||COMPLETE

Prince William County's Communications Office and Dept. of Information Technology are helping the Census Bureau, Community Foundation of Northern Virginia, and others in their efforts to achieve a complete count of the population for the 2020 Census. A complete count will ensure adequate funding levels to maintain and enhance the many services our residents rely on. An accurate 2020 Census will translate to the proper allocation of a projected $17.5 billion in Federal Spending Programs received by Virginia for programs such as Medicaid, Federal Student Locals, SNAP assistance, Medicare Part B, highway planning, Section 8 housing vouchers, school lunch assistance, Head Start, tax credits, and much more (see details here).

  • November 2018: Formation of PWC Complete Count Committee and training provided by Census 2020 partnership specialists.
  • January 24, 2019: 2020 Census and Complete Count Committee (CCC) information session with Census 2020 partnership specialists and PWC CCC leads.
  • February 20, 2019: PWC CCC leads attend Community Foundation of Northern Virginia's 1st "Count the Region" meeting with CCC leads from other Northern VA jurisdictions.
  • March 19, 2019: Prince William County's Board of County Supervisors declare April 1, 2019 as Census Awareness Day in the county. Census Partnership specialists formally accept the proclamation.
  • April 1, 2019PWC Complete County Committee meeting with participants from county agencies, the community, and Census 2020 partnership specialists.
  • June 6, 2019: Various PWC staff attended the conference Interventions that Work: 2020 Census and Hard-to-Reach Communities.
  • June 19, 2019: Prince William participated in a Census Solutions Workshop held in McLean, Virginia.
  • July 30, 2019: Prince William participated in Congressman Connolly's Census roundtable discussion at South County High School in Lorton.
  • September 4, 2019: US Census Bureau to host a Census Solutions Workshop in Prince William County.
  • October 15, 2019: Meeting for those involved in complete count activities in the area
  • December 10, 2019: Meeting for those involved in complete count activities in the area-affiliated event.
  • January 14, 2020: 2020 Census presentation to the Board of County Supervisors
  • January 14 & 16, 2020: CCC leads and Census Bureau train resident volunteers to help with the county's census outreach efforts aimed to bolster self-response rates between February through May 2020.
  • January 21, 2020: The Board of County Supervisors approve resolution to provide funding for the county's 2020 census outreach efforts.
  • February 12, 2020: Complete Count Committee meeting from 2-4PM in BOCS Chambers: 1 County Complex Court.
  • February 26, 2020: The last census volunteer training with an emphasis on bilingual volunteers. Hosted by the Census Bureau and demographer. 6:00PM @ Potomac Community Library.
  • March 11, 2020: Complete Count Committee meeting from 2-4PM in BOCS Chambers: 1 County Complex Court.
  • March-August 2020: Prince William works with Outfront Media and iHeart Radio to run a digital 2020 Census promotion campaign including promotion on mobile applicaitons, video and audio streaming platforms, web ads, social media ads, a popular Spanish-speaking radio station, ads on commuter buses, and concentrated and targeted digital promotion to low response neighborhoods.
  • August 14, 2020: Virtual Complete Count Committee meeting from 2-4PM
  • August-October: The Census Bureau works with Prince William to deploy Mobile Questionnaire Assistance (MQA) staff and information tables in public spaces in low response areas. Census staff advocated for the 2020 Census and helped residents complete the survey on the spot with tablets.


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