Decennial Census: Bureau Should Assess Significant Data Collection Challenges as it Undertakes Planning for 2030, Report to Congressional Requesters [open pdf - 2MB]
From the Highlights: "The 2020 Census was conducted under extraordinary circumstances. In response to the COVID-19 [coronavirus disease 2019] pandemic and related Commerce [Department of Commerce] decisions, the Bureau [Census Bureau] made a series of late changes to the design of the census. As GAO [Government Accountability Office] previously reported, these changes introduced risks to the quality of data that the Bureau provides for congressional apportionment and redistricting purposes. GAO was asked to review the Bureau's implementation of the 2020 Census. This report assesses the Bureau's implementation of the: (1) nonresponse follow-up operation, (2) group quarters enumeration, and (3) plans to assess those operations. To address these objectives, GAO conducted a series of surveys of all 248 census offices during the collection of data for those operations. GAO also monitored the cost and progress of operations and interviewed census field supervisors for each operation."
Government Accountability Office: https://www.gao.gov/