Data Release Timeline of 2020 Census
Upon release of county level data, Northern Virginia Regional Commission plans to do extensive data analysis. Results of the data analyses will be posted on this NOVA Region Dashboard website. Stay tuned!
By August 16, 2021
Redistricting demographic data will be released to the public. The format of the data file will require special software to extract data.
By September 30, 2021
A redistricting data toolkit will be released to the public. This will include an online Data Explorer tool that will allow the redistricting 2020 Census demographic data to be easily viewed and extracted.
By September 30, 2021
Anticipated release of a final set of demonstration data. Demonstration data allow data users to compare a differential privacy infused version of the 2010 Census results with the actual published 2010 Census results. For more information on differential privacy see the "Privacy and Accuracy of 2020 Census Data" section below.
October 2021 or Thereafter
The Demographics and Housing Characteristics file release data has not been set. This file will contain the 2020 Census data that was not released with the redistricting data file. It will likely be several months after October 2021 when it is released.
Privacy and Accuracy of 2020 Census Data
For decades, the U.S. Census Bureau has used different techniques to protect individual privacy through their Disclosure Avoidance System (DAS). Differential Privacy (DP) is the latest technique. This technique was chosen because enhanced privacy protection is needed due to advances in technology that enable the ability to identify individuals when combined with other information. DP will impact data accuracy more than any other technique previously applied to decennial census results. DP will add random data (“noise”) to counts for geographic areas below the state level, to prevent identification of individuals. The amount of noise added to the data will be greater than any prior decennial census technique.
Since 2019, Northern Virginia jurisdictions, through the Northern Virginia Regional Commission (NVRC), have been participating in the U.S. Census Bureau’s DP demonstration data review and provided feedback to the U.S. Census Bureau, with the latest provided for the April 2021 round. The following document is a brief overview of outstanding issues related to the implementation of DP. Click on the image to download.