| National Archives and Records Administration | Federal archives, historical records, and research catalogs | online/request | www.archives.gov |
| U.S. Securities and Exchange Commission | Public company filings and securities disclosures through EDGAR | online | www.sec.gov |
| Administrative Office of the U.S. Courts | Federal court records access through PACER and court information | paid | www.uscourts.gov |
| U.S. Patent and Trademark Office | Federal patent and trademark records | online | www.uspto.gov |
| General Services Administration | Data.gov catalog and federal administrative resources | online | www.gsa.gov |
| U.S. Census Bureau | Population, housing, economic, and geographic data | online | www.census.gov |
| Department of Justice | FOIA guidance, legal publications, and department records | online/request | www.justice.gov |
| Department of State | Diplomatic history, treaties, and department records | online/request | www.state.gov |
| Department of Defense | Defense publications and FOIA access | online/request | www.defense.gov |
| Department of Homeland Security | Homeland security records and FOIA access | online/request | www.dhs.gov |
| Department of the Treasury | Treasury publications, financial data, and FOIA access | online/request | home.treasury.gov |
| Internal Revenue Service | Tax forms, statistics, guidance, and limited records access | online/request | www.irs.gov |
| Federal Election Commission | Federal campaign finance reports and data | online | www.fec.gov |
| Environmental Protection Agency | Environmental datasets, enforcement, and facility information | online | www.epa.gov |
| Department of Labor | Labor statistics, enforcement information, and FOIA records | online/request | www.dol.gov |
| Bureau of Labor Statistics | Labor market, price, productivity, and compensation statistics | online | www.bls.gov |
| Department of Education | Education data, publications, and FOIA access | online/request | www.ed.gov |
| National Center for Education Statistics | Education statistics and survey datasets | online | nces.ed.gov |
| Department of Health and Human Services | Health and human services publications and FOIA records | online/request | www.hhs.gov |
| Centers for Disease Control and Prevention | Public health data and vital statistics guidance | online | www.cdc.gov |
| Food and Drug Administration | Drug, device, inspection, recall, and regulatory records | online/request | www.fda.gov |
| Centers for Medicare & Medicaid Services | Program data, provider datasets, and public use files | online | www.cms.gov |
| Department of Transportation | Transportation datasets, safety records, and FOIA access | online/request | www.transportation.gov |
| Federal Aviation Administration | Aviation data, registrations, safety information, and FOIA records | online/request | www.faa.gov |
| National Highway Traffic Safety Administration | Vehicle safety, recalls, complaints, and crash data | online | www.nhtsa.gov |
| Department of Energy | Energy publications, datasets, and FOIA access | online/request | www.energy.gov |
| Energy Information Administration | Official U.S. energy statistics and datasets | online | www.eia.gov |
| Department of Agriculture | Agriculture programs, publications, datasets, and FOIA access | online/request | www.usda.gov |
| National Agricultural Statistics Service | Agricultural production and economic statistics | online | www.nass.usda.gov |
| Department of the Interior | Public lands, natural resources, and FOIA records | online/request | www.doi.gov |
| U.S. Geological Survey | Earth science maps, datasets, publications, and monitoring records | online | www.usgs.gov |
| Bureau of Land Management | Public land records, maps, and planning documents | online/request | www.blm.gov |
| Federal Communications Commission | Licensing, filings, enforcement, and communications data | online | www.fcc.gov |
| Federal Trade Commission | Consumer protection cases, reports, and FOIA records | online/request | www.ftc.gov |
| Consumer Financial Protection Bureau | Consumer complaint data, rules, enforcement, and FOIA records | online/request | www.consumerfinance.gov |
| National Transportation Safety Board | Transportation accident investigations and dockets | online | www.ntsb.gov |
| Government Accountability Office | Audit reports, decisions, and federal oversight publications | online | www.gao.gov |
| Office of Management and Budget | Budget, policy, information collection, and regulatory review materials | online | www.whitehouse.gov |
| Congress.gov | Official federal legislative information from the Library of Congress | online | www.congress.gov |
| U.S. Government Publishing Office | Authenticated federal publications through GovInfo | online | www.govinfo.gov |