Case reporters are the bound volumes and digital databases that collect judicial opinions in chronological order, giving lawyers, judges, and the public a permanent, citable record of what courts have decided. They are the working library of the American common law system: because courts follow earlier decisions to resolve new disputes, the text preserved in these volumes functions as active legal authority, not just archived history. Federal law requires the Government Publishing Office to print and distribute Supreme Court decisions in the United States Reports,1Office of the Law Revision Counsel. 28 USC 411 – Supreme Court Reports; Printing, Binding, and Distribution and parallel systems exist for lower federal courts and every state.
Official Reporters and Unofficial Reporters
Official reporters are published under government authority and carry the highest legal weight. When a court rule tells a lawyer to cite “the official report,” it means the government-sanctioned version. These editions contain the plain text of the opinion, without editorial extras.
Unofficial reporters are produced by private publishers. They reprint the identical opinion text but add features built for research: headnotes flagging specific legal points, cross-references to related decisions, and topic-based indexing. The opinion itself cannot differ from the official version, but the packaging around it can be far more useful when you’re working through many cases on one issue. Unofficial versions also tend to come out faster, which is why many practitioners reach for them first.
How an Opinion Reaches a Reporter Volume
A judicial decision passes through three formats on its way to a bound reporter, and the format determines how you cite the case at any given moment.
- Slip opinion. The court releases the decision as a standalone document, often posted on the court’s own website within hours. Citation is temporary and will change.
- Advance sheets. Recent opinions are collected into paperback pamphlets that use the volume and page numbers of the eventual bound reporter. From this stage forward, the citation format is stable.
- Bound volume. Several advance sheets are combined into the permanent hardcover. The citation is now locked in.
The legal content is identical across all three; only the physical form and the permanence of the citation change.
Federal Case Reporters
Federal opinions are published in a hierarchy that mirrors the court structure.
The United States Reports is the official reporter for U.S. Supreme Court decisions, and the Supreme Court’s own website confirms it as the sole official publication.2Supreme Court of the United States. U.S. Reports Two unofficial alternatives reprint the same opinions with added editorial features: the Supreme Court Reporter (S. Ct.) and the Lawyers’ Edition (L. Ed.).
Decisions from the thirteen federal circuit courts of appeals appear in the Federal Reporter. The series has moved through multiple editions: the original F., then F.2d, F.3d, and, since September 2021, F.4th. A recent circuit court opinion will almost certainly carry an F.4th citation.
Trial-level rulings from federal district courts appear in the Federal Supplement, currently in its third series (F. Supp. 3d). Not every district court opinion is published; judges designate a decision for publication or decline to do so.
Specialized federal courts maintain their own series. The U.S. Tax Court publishes regular opinions in the Tax Court Reports (“T.C.”) and memorandum opinions as “T.C. Memo.”3United States Tax Court. Opinion Citation and Style Manual Bankruptcy court decisions appear in the Bankruptcy Reporter (B.R.), and the Court of Federal Claims uses the Federal Claims Reporter.
State Cases and the Regional Reporter System
Each state has its own official reporter for its appellate decisions. Working across state lines using only those official series is slow, which is the gap West’s National Reporter System was built to close.
West groups every state’s appellate opinions into seven regional reporters, each covering a cluster of states:
- Atlantic Reporter (A.3d)
- North Eastern Reporter (N.E.2d)
- North Western Reporter (N.W.2d)
- South Eastern Reporter (S.E.2d)
- Southern Reporter (So.3d)
- South Western Reporter (S.W.3d)
- Pacific Reporter (P.3d)
The groupings are historical and do not always track modern geography, but they have stayed stable for decades. Because every state’s cases run through the same editorial and indexing system, a researcher can move from a Georgia opinion to an Oregon opinion without learning a new organizational scheme. West also publishes state-specific reporters for high-volume jurisdictions such as California and New York.
What You’ll Find Inside a Reporter Entry
Open any reporter and the layout is consistent, built for fast scanning.
The caption sits at the top: the parties, the court, and key dates. Below it, many reporters include a syllabus, a brief summary of the legal questions and how the court resolved them. The Supreme Court prepares its own syllabus for each opinion, but even that summary carries a disclaimer noting it is not part of the binding decision.
Headnotes come next: short paragraphs written by the publisher’s editorial staff. Each headnote isolates a single legal point and tags it with a topic classification. Headnotes are research tools, not law. No court is bound by what a headnote says; if a headnote misreads the opinion, the opinion controls.
West’s headnotes feed into the Key Number System, a classification scheme that divides American law into over 400 topics and more than 98,000 legal issues. Every headnote in every West reporter is assigned a topic and a key number. Once you find one case on point, you can pull its key numbers and retrieve every other case in the system addressing the same issue, in any jurisdiction. Most experienced legal researchers start there when they need to see how courts across the country have handled a specific question.
The opinion itself is the only part of the entry that carries legal authority. It lays out the facts, identifies the applicable law, and walks through the court’s reasoning. Where multiple judges sit, concurring opinions (agreeing with the result for different reasons) and dissenting opinions (disagreeing with the result) appear in full text after the majority opinion.
Reading a Case Citation
A citation is essentially a street address for an opinion. The standard format packs three pieces of information into a compact string: a volume number, a reporter abbreviation, and a starting page.
In 410 U.S. 113, the 410 is the volume, “U.S.” identifies the United States Reports, and 113 is the page where the opinion begins.2Supreme Court of the United States. U.S. Reports The same logic runs through every series: 595 F.4th 221 means volume 595 of the Federal Reporter Fourth Series, starting at page 221.
Parallel Citations
The same opinion often appears in both the official reporter and one or more unofficial reporters. Legal writing sometimes requires parallel citations that list every version. A Supreme Court case, for example, might be written as 347 U.S. 483, 74 S. Ct. 686, 98 L. Ed. 873. Each entry points to a different reporter; all three lead to the same opinion. Some courts require parallel citations in briefs; others accept only the official cite. Check your court’s local rules before filing.
Star Paging
When you read a case in an unofficial reporter or a digital database, you still need to cite the official reporter’s page numbers. Star paging inserts asterisks and page numbers within the text to show where each page break falls in the official printed volume. If you’re reading on Westlaw and see “*485” mid-paragraph, everything after that marker sits on page 485 of the official reporter. That lets you generate accurate pinpoint citations without pulling the physical volume.
Unpublished Opinions
Not every decision ends up in a reporter. Federal appellate courts routinely designate certain opinions as “unpublished” or “non-precedential,” meaning the court does not treat them as binding authority on future cases. These tend to be straightforward applications of settled law.
For decades, many circuits banned lawyers from even citing unpublished opinions in briefs. Federal Rule of Appellate Procedure 32.1, effective in 2007, changed that. The rule provides that no court may prohibit or restrict the citation of any federal judicial opinion designated as unpublished if it was issued on or after January 1, 2007. If you cite an unpublished opinion that is not available in a publicly accessible electronic database, you must file and serve a copy along with your brief.4Legal Information Institute (LII). Federal Rules of Appellate Procedure Rule 32.1
The rule guarantees you can cite these opinions; it does not make them precedential. Most circuits treat unpublished opinions as persuasive authority at best, meaning a court may find the reasoning helpful but is not obligated to follow it. A few circuits draw finer lines, so check the local circuit rules before leaning heavily on one.
Where to Read Case Reporters
You don’t need a law degree or a paid subscription to read most judicial opinions.
Public law libraries, found in most county courthouses and many universities, keep physical reporter collections open to anyone. Reference librarians can point you to the right volume and explain citation formats if you’re new to the process.
For digital access, Google Scholar offers a free, searchable database of federal and state opinions covering the Supreme Court, circuit courts, district courts, tax courts, bankruptcy courts, and state appellate courts. The Caselaw Access Project, a collaboration between the Harvard Law School Library and the Free Law Project, provides free public access to over 6.5 million decisions spanning 360 years of American legal history.5Library Innovation Lab. Caselaw Access Project
PACER (Public Access to Court Electronic Records) is the federal judiciary’s own portal for court filings and opinions. Access costs $0.10 per page, capped at $3.00 per document.6United States Courts. Electronic Public Access Fee Schedule If your total PACER charges in a calendar quarter come to $30 or less, the fees are waived.7PACER: Federal Court Records. PACER Pricing: How Fees Work For casual researchers pulling a handful of documents, that waiver effectively makes PACER free.
Paid commercial databases such as Westlaw and LexisNexis remain the tools of choice for practicing lawyers because they bundle full reporter text with the Key Number System, citation-checking tools, and extensive search filters. Law students usually receive free access; individual subscriptions can run into hundreds of dollars per month.