- United States Code
- United States Code (Main editions and supplements of the United States Code from 1925 through the 1988 edition)
- U.S. Constitutions, Statutes, and Codes
- U.S. Constitution Annotated
- OpenSecrets.org (Follow federal campaign contributions)
- GovInfo (GPO's beta website)
- U.S. Government Publishing Office (GPO) (U.S. Code, bills, public and private laws)
- DiscoverGPO (search across multiple U.S. Federal Government databases, including GPO's Catalog of U.S. Government Publications (CGP) and GovInfo)
- Congressional Record
- Congressional Record (Historical Bound Congressional Records)
- U.S. Department of Justice Legislative Histories
- Federal Legislative History Research
- U.S. Code Table of Popular Names
- Library of Congress, U.S. Congressional Documents & Debates, 1774-1875
- Congressional Research Service Reports (Thurgood Marshall)
- Congressional Research Service Reports (U. of North Texas)
- Congress.gov (Online site from the Library of Congress)
- Capitol Hearings C-SPAN
- U.S. Congressional Documents Online Collection
- LLRX.com (Reference Resources)
- GovTrack.us (Status of federal legislation, voting records, congressional district maps)
- United States Code Classification Tables
- Statutes at Large
- Congressional Research Service (CRS) Reports (Searchable website of CRS reports collected by Stanford Univ.)
- Legislative Histories of Selected U.S. Laws on the Internet
- Wikileaks Congressional Research Service
- Search the United States Code
- U.S. Code Collection
- U.S. Senate Active Legislation
- Code of Federal Regulations (Annual Edition)
- Federal Register
- Index of U.S. Government Departments and Agencies
- Administrative Agency Decisions & Other Actions
- Cyber Cemetery
- United States Government Manual
- regulations.gov (Proposed rules, rules, notices, public commentary, supporting materials)
- reginfo.gov (Information about regulations under development)
- Department of Agriculture
- Department of Commerce
- Census Bureau
- Patent & Trademark Office
- Department of Defense
- Department of Education
- Department of Energy
- Office of Legal Counsel: U.S. Attorney General
- Department of Health & Human Services
- Centers for Medicare & Medicaid Services
- Dept. of Housing & Urban Development
- Department of the Interior
- Department of Justice
- U.S. Citizenship and Immigration Services
- Department of Labor
- Department of State
- Office of the Inspector General
- Department of Transportation
- Department of the Treasury
- Internal Revenue Service
- Department of Veterans Affairs
- Department of Homeland Security
- Office of National Drug Control Policy
- Office of Management and Budget
- Office of The United States Trade Representative
- Consumer Product Safety Commission
- Environmental Protection Agency
- Fed. Communications Commission
- Federal Trade Commission
- National Labor Relations Board
- Nuclear Regulatory Commission
- Securities & Exchange Commission
- Social Security Administration
- The U.S. Access Board
- Federal Energy Regulatory Commission
- National Transportation Safety Board
- Federal Election Commission
- Federal Aviation Administration
- Federal Reserve System
- Food & Drug Administration
- Occupational Safety & Health Administration