LibGuides: Statistics and Data Resources: Home

Archived federal data

This guide recommends starting points for data sources from a variety of vendors, organizations, and agencies, including federal agencies. Due to various circumstances, including administrative transitions, federal data that was once accessible may become unavailable from the original federal source. However, many organizations and institutions actively work to archive federal and other data for future purposes, often referred to as Data Rescue efforts. If you are searching for federal data that is currently unavailable, we recommend exploring the resources listed below.

For continually updated information on government actions with potential impacts on research, refer to the Council on Government Relations (COGR) Administration Transition Information & Resources page.

Can't find the data you need? Contact your librarian to discuss strategies or possible alternative data sources.

Data.gov Archive (Harvard Law School Library)
Led by the Library Innovation Lab Team at Harvard Law School Library, this project archives over 311,000 federal public datasets (16TB) harvested from data.gov during 2024 and 2025. It will be updated daily as new datasets are added to data.gov.
Data Rescue Project
This project is a coordinated effort by the International Association for Social Science Information Service & Technology (IASSIST), Research Data Access & Preservation (RDAP) Assocation, and members of the Data Curation Network. Find information and updates on data rescue efforts currently underway, avenues for finding purged datasets, as well as ways to contribute to these preservation efforts.
GovArchive.us
Browse archived websites from the US Government as part of the End of Term Web Archive. The focus has been on complex and interactive websites. Sites are available as standalone mirrors hosted on subdomains, aiming to replicate the original site and its URL structure as closely as possible. Read this press release for more information about the project.
Guide to Finding Government Information during the 2025 Administration Transition
Created by University of Minnesota Libraries, this guide points to resources that identify and track actions taken by the Trump administration and Congress to scale back or eliminate access to federal government information. It also provides links to groups performing data and website rescue.
Guide to US Government Information
In addition to providing general sources for data and information on US government research topics, this guide lists resources for tracking changes that could impact research and access to research. Created by UC San Diego Library.
Policy Commons 2025 Open Collection
An initiative to rescue and preserve materials from government organizations facing the removal of public information and data. Coherent will archive, assign permanent unique identifiers, and index the materials for discovery through Google Scholar and academic databases. Each item will be enriched with detailed metadata—and made openly available to the public. Note: The open collection and Rescue-to-Open program will officially launch at the ER&L Conference on March 23, 2025.

Popular statistical sources

Census Data - Main Search
Explore Census data on the U.S. population, places (by country, state, county, city, zip, tract, etc.), and economies. Topics include housing, poverty, education, and more.

Historical Statistics of the United States (Millennial edition) This link opens in a new window
Find statistics on virtually every quantifiable dimension of American history from 1790 to the present. Topics range from migration and health to crime and labor, and are each placed in historical context by a recognized expert in the field.
If you get a Cambridge service announcement page, please clear your browser's cookies (specifically, those for hsus and arizona.edu).
PolicyMap This link opens in a new window
U.S. national data, GIS mapping tool and analytics platform with data related to demographics, neighborhood conditions, real estate markets, federal income-eligible areas, money and income, lending activity, jobs and economy, education, health and more.
Data can be viewed by census block or tract in many cases, and city, county, zip code, state as well as congressional district, school district, state house and state senate districts.
PolicyMap data can be presented as maps, tables, charts, and reports. Unlimited address-based data can be uploaded for use in PolicyMap.
Social Explorer This link opens in a new window
Provides easy access to current and historical census data and demographic information for the United States. You can create thematic maps, interactive maps, and customized reports. Also includes data from the U.S. Census' American Community Survey and 1980-2000 Religious Congregations and Membership Study. Maps and reports can be printed or downloaded.
Statista This link opens in a new window
Access statistical data from market and opinion research institutions, as well as from business organizations and government, categorized into 21 market sectors.

Data Cooperative (UA Libraries)
Whether you have questions about developing data management plans, finding data, or analyzing and visualizing data, the Data Cooperative at UA Libraries can help.

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Statistics and Data Resources

Archived federal data

Popular statistical sources

Information for

Libraries & Locations

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Statistics and Data Resources

Archived federal data

Popular statistical sources

Information for

Libraries & Locations

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