CDC Datasets Uploaded Before January 28th, 2025
https://archive.org/details/20250128-cdc-datasets
The Internat Archive is hosting an archive of "all CDC datasets uploaded to https://data.cdc.gov/browse before January 28th, 2025," with the caveats that the data are only those which were publicly available and that much of the data here are tables consisting summarized from larger surveys and collections. Note that those underlying data from recurring health surveys may not be available here.
Data.Gov Archive
https://source.coop/repositories/harvard-lil/gov-data
Harvard Law School Library's Library Innovation Lab has released an archive of https://data.gov/. The archive is regularly updated. See https://lil.law.harvard.edu/blog/2025/02/06/announcing-data-gov-archive/ for more information about this specific project, and see https://lil.law.harvard.edu/blog/2025/01/30/preserving-public-u-s-federal-data/ for more about the Data Vault Project to preserve publicly-funded open data available from the Federal Government.
Publicdata: An Archive of Public Data Sets
https://git.lsit.ucsb.edu/publicdata
UC-Santa Barbara's Letters Sciences IT has captured the contents of websites from agencies such as the National Institutes of Health, the Social Security Administration, the Centers for Medicare & Medicaid Services, the Agency for Healthcare Research and Quality, the Substance Abuse and Mental Health Services Administration, and many other agencies. Note that what is archived here are websites and not always actual datasets.
RestoredCDC.Org
https://restoredcdc.org/www.cdc.gov/
The RestoredCDC.Org project is taking copies of CDC website pages that had been archived prior to January 20, 2025 in an effort to rebuild the CDC's website as it was constructed and organized at that time. The project is a longer-term undertaking as its members work to re-create the navigation of the site and the links that connect pages across the site. The site will include data and contextual information and functionality, within the limits of what had been archived prior to January 20, 2025. If you wish to contribute to this project, see https://aboutus.restoredcdc.org/mission.