For more about researching Federal law, see the Law Library's Federal law guide.
United States Constitution
- Cornell Legal Information Institute (LII) (Cornell's Legal Information Institute provides high-quality access to a variety of legal texts, including this version of the U.S. Constitution).
- Constitution of the United States of America: Analysis and Interpretation (FDsys) (This is a comprehensive government guide to the Constitution with commentary and citations to case law).
Legislative Branch
- United States Code (official) (The United States Code contains the statutes in force of the United States arranged by subject)
- United States Code (LII) (Cornell's U.S.C. is included because it is easy and convenient to use and is the best, free unofficial code).
- Congress.gov (Congress.gov, which replaces the old Thomas website, is the official website of congress. It has bills, public laws, and congressional reports by to the 1980s and powerful tools for both tracking current legislation and for determining the legislation history of federal laws).
Judicial Branch
- United States Supreme Court (official)
- United States Supreme Court (LII)
- United States Circuit & District Courts (U.S. Courts maintained by the Administrative Office of the U.S. Courts on behalf of the Federal Judiciary)
- Federal Rules of Civil Procedure, Appellate Procedure, Criminal Procedure, Evidence & Bankruptcy (LII)
Executive Branch
- FDsys: GPO's Federal Digital System
- Govinfo : the GPO's new system that will eventually replace FDsys
- Code of Federal Regulations (FDsys) (The general and permanent regulations of the United States arranged by subject)
- List of CFR Sections Affected -- LSA (FDsys) (The LSA is used to check that a particular CFR section has not been superseded by a new regulation)
- Federal Register (FDsys) (The Federal Register is published daily and has all new regulations, as well as proposed regulations, notices of upcoming regulatory hearings, and executive orders).
- Executive Orders of the President of the United States, 1933-present (National Archives) (Executive Orders are official documents, numbered consecutively, through which the president of the United States manages the operations of the federal government)