The purpose of the Post-Enumeration Survey is to measure the accuracy of the census. The survey measures the accuracy of the census by independently surveying a sample of the population.
The U.S. Census Bureau has used post-enumeration surveys with dual system estimation to measure coverage in the Decennial Censuses of Population and Housing since 1980. This approach involves case-by-case matching of persons in an independent survey with persons in the census to determine who was missed or counted in error.
The post-enumeration survey-based coverage measurement program associated with the 2020 Census is called the Post-Enumeration Survey (PES).
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The primary goal of the 2020 Post-Enumeration Survey (PES) program was to measure coverage error in the 2020 Census such that this information could be used to improve the coverage of future censuses. Fieldwork for the 2020 PES began in January 2020 and ended in February 2022.
The first release provides estimates of population coverage overall and for important demographic groups for the nation. The second release will provide estimates of population coverage for states and by some census operations, as well as for coverage of housing units.
U.S. Census Bureau Releases 2020 Undercount and Overcount Rates
The U.S. Census Bureau released the 2020 Census estimated undercount and overcount rates by state and the District of Columbia from the PES.
Coverage Reports and Data
Census Bureau Releases Estimates of Undercount and Overcount in the 2020 Census
The U.S. Census Bureau released results today from two analyses about the quality of the 2020 Census counts.
Coverage Reports and Data
Census Bureau Today Releases 2020 Census Undercount, Overcount Rates by State
The 2020 Post-Enumeration Survey provides an estimate of the undercount or overcount results for each state and by census operation.
Who Was Undercounted, Overcounted in the 2020 Census?
The U.S. Census Bureau used two measures of coverage to estimate who was missed or counted more than once in the 2020 Census.
Provides an overview of coverage estimates for people of the United States by state and census operations, presented: May 19, 2022.
Provides an overview of the survey, presented during the National Advisory Committee Spring Meeting: May 6-7, 2021.
Describes changes because of the COVID-19 pandemic, early response rates and how we’re addressing correlation bias, presented during the Census Scientific Advisory Committee Meeting: March 18-19, 2021.
Provides an overview of PES methodology, presented during the Census Scientific Advisory Committee Meeting: September 17–18, 2020.
Post-Enumeration Survey (PES) Press Kit
The purpose of the Post-Enumeration Survey is to measure the accuracy of the census by independently surveying a sample of the population.
Upcoming 2020 Census Coverage Estimates
The U.S. Census Bureau released coverage estimates for the 2020 Census.