What Is the U.S. Code and How Is It Organized?

The US Code is the official compilation of all general and permanent federal laws, arranged by subject across 53 titles rather than by the date each law passed. Congress first published it in 1926, and the Office of the Law Revision Counsel (OLRC) of the U.S. House of Representatives has kept it current ever since. Because it is organized by topic, you can find every active federal statute on a subject in one place instead of hunting through decades of session laws.

How the Code Is Organized

The structure runs top down. The 53 titles each cover a broad area of federal law. Within a title, the content is grouped into chapters and subchapters, then parts, and finally individual sections that contain the actual statutory text.

A handful of titles come up constantly. Title 18 covers federal crimes and criminal procedure. Title 26 is the Internal Revenue Code. Title 42 addresses public health and welfare, including Social Security and civil rights statutes. Title 11 governs bankruptcy, and Title 35 covers patents. Recognizing even a few of these numbers makes legal references in news stories, court filings, and government notices much easier to follow.

Some titles also carry an appendix holding related provisions that sit outside the main numbered sections. Even when a title has been formally enacted into positive law, its appendix does not automatically share that enacted status.

How to Read a US Code Citation

A standard citation follows a simple formula: the title number, the abbreviation “U.S.C.,” a section symbol (§), and the section number. So 18 U.S.C. § 111 points to Title 18, section 111, which deals with assaulting or impeding federal officers. You never need to include the chapter or subchapter.

A range of sections uses a double section symbol: 15 U.S.C. §§ 77a–77aa, for example, spans the Securities Act provisions within Title 15. Multiple non-consecutive sections use the same double symbol with commas between the numbers.

Positive Law Titles and Prima Facie Titles

Not every title carries the same legal weight. Of the 53 titles, 27 have been formally enacted into positive law by Congress.¹ For those titles, the Code text itself is the law. If a discrepancy ever surfaces between a positive law title and the original session law in the Statutes at Large, the Code’s language controls.²

The remaining titles are prima facie evidence of the law. The Code text is treated as an accurate restatement, but if a conflict exists between the Code version and the Statutes at Large, the Statutes at Large win. Lawyers citing a non-positive-law title in court should be ready to point back to the session law if the other side challenges the wording.²

What Sits Under a Section

When you open a section online, you’ll see more than the statute itself. The OLRC adds two categories of supplementary material, and the distinction matters.³

Editorial notes are written by the OLRC’s staff to explain where a section came from and how it has changed. The most common kinds are Historical and Revision Notes, which trace legislative history; Amendments notes, which list the public laws that changed the section’s text; and Effective Date notes, which specify when a provision took legal effect (not always the date the president signed it).

Statutory notes are different. They are the actual text of enacted laws that don’t get their own section number, placed beneath a related section for convenience. These carry the force of law just like the numbered sections above them. Provisions that are temporary, that apply only to a specific group or place, or that appropriate money for a single year typically appear this way rather than in the permanent section numbering.³

How Laws Get Into the Code

When Congress passes a bill and the president signs it, the new law first appears in the United States Statutes at Large, a chronological record of every public and private law in the order it was enacted.⁴ The OLRC then classifies each new provision to its proper position in the Code, updates or removes language that has been repealed or superseded, and reconciles amendments to existing sections. Its statutory job is to “develop and keep current an official and positive codification of the laws of the United States.”⁵

The US Code Versus the Code of Federal Regulations

The US Code is often confused with the Code of Federal Regulations (CFR), and the names don’t help. The difference comes down to who wrote the rule. The US Code contains statutes passed by Congress. The CFR contains regulations written by federal agencies to carry out those statutes.⁶

In practice, a statute in the Code often authorizes an agency to fill in the details, and the agency then publishes the detailed compliance requirements in the CFR. The CFR is organized into 50 titles (separate from the Code’s 53), typically arranged by issuing agency. A CFR citation looks similar to a Code citation but uses “CFR” in place of “U.S.C.”; for example, 1 CFR 10.2 refers to title 1 of the Code of Federal Regulations, part 10, section 2.⁷

Where to Read the Code and How Current It Is

Two official government websites provide free full-text access:

uscode.house.gov, maintained by the OLRC, is the most frequently updated online version and the closest thing to a definitive digital edition.⁸
govinfo.gov, run by the Government Publishing Office, hosts downloadable PDF versions alongside the Statutes at Large and the CFR.⁹

The online version is updated on an ongoing basis as new public laws are enacted.¹⁰ The printed edition moves more slowly: a complete new edition is published every six years, with annual cumulative supplements in between.⁹

Even the online version has some lag. After a bill is signed, the OLRC still needs to classify and integrate the new text. For the very latest wording of a newly enacted statute, check the Statutes at Large or the enrolled bill on congress.gov. The Classification Tables on the OLRC site show which new public laws have already been incorporated and which are still pending. GovInfo also cautions that anyone relying on its version for legal research should verify results against the printed Code.⁹

The OLRC’s search engine supports quoted phrases, Boolean operators (and, or, not), proximity operators such as “near/5,” and wildcards (a question mark for one character, an asterisk for any number of characters).¹¹

Official Versus Annotated Editions

The version maintained by the OLRC is the official US Code. Two commercial alternatives exist: the United States Code Annotated (U.S.C.A.), published on Westlaw, and the United States Code Service (U.S.C.S.), published on Lexis. The annotated editions include the same statutory text and add editorial features like case summaries, cross-references, and practice notes showing how courts have interpreted a provision.

The trade-offs are cost and citation convention. The annotated editions sit behind paywalls, while the official Code is free. In court filings and scholarly work, citations should reference the official U.S.C. rather than U.S.C.A. or U.S.C.S. whenever the official version contains the current text.

1
Office of the Law Revision Counsel. Positive Law Codification
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Office of the Law Revision Counsel. 1 US Code 204 – Codes and Supplements as Evidence of the Laws of United States and District of Columbia; Citation of Codes and Supplements
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Office of the Law Revision Counsel. Detailed Guide to the United States Code Content and Features
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GovInfo. Statutes at Large
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Office of the Law Revision Counsel. 2 USC Ch. 9A – Office of Law Revision Counsel
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GovInfo. Code of Federal Regulations
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eCFR. Form of Citation
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Office of the Law Revision Counsel. Office of the Law Revision Counsel
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GovInfo. About the United States Code
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Office of the Law Revision Counsel. Frequently Asked Questions and Glossary
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Office of the Law Revision Counsel. Help Searching the United States Code