Case law reporters are the bound volumes and digital collections that publish the written opinions of American courts, each opinion sitting at a fixed address of volume number, reporter abbreviation, and page. That address is what lets a judge, lawyer, or member of the public pull the exact text of a decision decades after it was handed down, and it’s what makes the common law system’s reliance on precedent workable in practice.
Official and Unofficial Reporters
Reporters come in two flavors. Official reporters are published under government authority. The United States Reports is the sole official reporter for U.S. Supreme Court opinions, and federal law requires that Supreme Court decisions be printed and distributed there as soon as practicable after they are handed down.1Office of the Law Revision Counsel. 28 USC 411 – Supreme Court Reports; Printing, Binding, and Distribution The Reporter of Decisions, a statutory officer appointed by the Court, compiles each volume.2Supreme Court of the United States. U.S. Reports
The catch is speed. Bound volumes of the United States Reports often lag years behind the decisions themselves. That gap created the market for unofficial reporters, published by private companies like Thomson Reuters (West) and LexisNexis. For Supreme Court cases the two major unofficial reporters are the Supreme Court Reporter (S. Ct.) and the United States Supreme Court Reports, Lawyers’ Edition (L. Ed.). The opinion text is identical; the commercial versions reach shelves and databases faster and bundle research tools like headnotes and annotations that the official volumes lack.
Most state courts follow the same pattern, publishing their own official reporters while also appearing in West’s National Reporter System. A handful of states have stopped publishing their own official reporters entirely, leaving the West regional reporter as the only print source. When a court designates one reporter as official, that version controls if any textual discrepancy arises. In practice, real discrepancies are vanishingly rare.
The National Reporter System
West’s National Reporter System is the most comprehensive print collection of American case law. It covers every level of the federal judiciary and groups all fifty states plus the District of Columbia into seven regional reporters:
- Atlantic Reporter (A.): Connecticut, Delaware, Maine, Maryland, New Hampshire, New Jersey, Pennsylvania, Rhode Island, Vermont, and the D.C. Municipal Court of Appeals.
- North Eastern Reporter (N.E.): Illinois, Indiana, Massachusetts, New York, and Ohio.
- North Western Reporter (N.W.): Iowa, Michigan, Minnesota, Nebraska, North Dakota, South Dakota, and Wisconsin.
- Pacific Reporter (P.): Alaska, Arizona, California, Colorado, Hawaii, Idaho, Kansas, Montana, Nevada, New Mexico, Oklahoma, Oregon, Utah, Washington, and Wyoming.
- South Eastern Reporter (S.E.): Georgia, North Carolina, South Carolina, Virginia, and West Virginia.
- South Western Reporter (S.W.): Arkansas, Kentucky, Missouri, Tennessee, and Texas.
- Southern Reporter (So.): Alabama, Florida, Louisiana, and Mississippi.
The groupings are purely geographic. They have nothing to do with shared legal traditions or uniform laws, so don’t assume that states in the same reporter interpret statutes the same way.
Federal Reporters
Federal decisions have their own dedicated reporters within the system. The Federal Reporter (F., F.2d, F.3d, F.4th) publishes opinions from the U.S. Courts of Appeals, and the Federal Supplement (F. Supp., F. Supp. 2d, F. Supp. 3d) covers the U.S. District Courts at the trial level. The “2d,” “3d,” and “4th” labels indicate a new series that restarted the volume numbering when the previous series grew unwieldy. A case in F.4th is no more authoritative than one in the original Federal Reporter; the series marker is a librarian’s convenience.
Subject-Specific Reporters
Beyond the geographic and court-level volumes, West publishes specialty reporters that pull together cases from multiple courts on a single legal topic. The Bankruptcy Reporter collects bankruptcy decisions from bankruptcy courts, district courts, and appellate courts in one place. The Education Law Reporter does the same for school-related disputes, and the Veterans Appeals Reporter covers decisions from the Court of Appeals for Veterans Claims. These are most useful for practitioners focused on one area of law.
How to Read a Case Citation
Every reported case has a citation that works like a street address: volume number, reporter abbreviation, and starting page. The citation 410 U.S. 113 tells you to open volume 410 of the United States Reports and turn to page 113, where you’ll find Roe v. Wade.3Justia. Roe v. Wade, 410 US 113 (1973) A reference to a specific passage adds a second page number after a comma, called a pinpoint or pincite: 410 U.S. 113, 153 sends you to page 153 of that opinion.
The year appears in parentheses at the end, along with the court name when it isn’t obvious from the reporter. A U.S. Reports citation doesn’t name the court because only the Supreme Court is published there. A Federal Reporter citation includes the circuit: Smith v. Jones, 750 F.3d 200 (2d Cir. 2014) came from the Second Circuit Court of Appeals in 2014. The year helps a researcher gauge how current the precedent is and whether intervening decisions might have changed the law.
When the same opinion appears in both official and unofficial reporters, you’ll sometimes see parallel citations listing all locations. A Supreme Court opinion might be cited as 410 U.S. 113, 93 S. Ct. 705, 35 L. Ed. 2d 147. Each string points to the same opinion in a different reporter. Some state courts require parallel citations in briefs; others have moved away from the practice. Most federal courts and law reviews follow The Bluebook: A Uniform System of Citation.
What’s Inside a Reported Opinion
A reported opinion isn’t just a block of text. Publishers layer navigational tools on top of the judge’s words.
Syllabus
The entry typically opens with a syllabus summarizing the facts, procedural history, and holding. In Supreme Court cases the Reporter of Decisions prepares this summary for the convenience of the reader, and it explicitly is not part of the official opinion.2Supreme Court of the United States. U.S. Reports That distinction sounds academic until you try to quote the syllabus as binding law in a brief. Courts will not treat it as authoritative. Use the syllabus to orient yourself, then cite the actual opinion text.
Headnotes and the West Key Number System
Below the syllabus in unofficial reporters you’ll find headnotes: short numbered paragraphs, each summarizing a single legal point in the opinion. Editors at West or LexisNexis write these, not the judges. Headnotes are research tools, not legal authority, and citing one in a court filing is a quick way to undermine your credibility. Trace the headnote back to the corresponding passage and cite that instead.
In West publications, each headnote is tagged with a topic and key number from the West Key Number System, which classifies American law into over 400 topics and tens of thousands of sub-issues. Find a headnote on point in one case, click the key number, and you get every other case in the system tagged with the same legal issue, across jurisdictions and time periods. It’s the main reason many practitioners still pay for Westlaw.
Majority, Concurring, and Dissenting Opinions
The majority opinion is the core. Written by one justice or judge on behalf of the majority, it announces the court’s holding and explains the legal reasoning. This text carries the force of law and creates binding precedent.
A concurring opinion agrees with the outcome but arrives there through different reasoning. Concurrences sometimes signal where the law might shift, especially when a narrower rationale is later adopted by other courts. Dissenting opinions explain why one or more judges disagreed with the result. Dissents carry no legal authority at the time they’re written, but a well-reasoned dissent occasionally foreshadows a future reversal.
Published Versus Unpublished Decisions
Not every judicial opinion ends up in a reporter. Courts designate many decisions as “unpublished” or “not for publication,” meaning they won’t appear in the bound volumes of the Federal Reporter or state equivalents. The label is somewhat misleading in the digital age because most unpublished opinions are still accessible through electronic databases. What “unpublished” really signals is that the court considers the decision non-precedential.
Federal appellate courts generate far more unpublished opinions than published ones. Federal Rule of Appellate Procedure 32.1 addresses the citation question: no federal court may prohibit or restrict citation of unpublished opinions issued on or after January 1, 2007.4Legal Information Institute (LII) / Cornell Law School. Federal Rule of Appellate Procedure 32.1 You can cite them, but they typically carry less persuasive weight than published decisions. For unpublished opinions issued before that date, local circuit rules control.
State courts vary widely. Some flatly prohibit citing unpublished opinions except in narrow circumstances like collateral estoppel or law-of-the-case arguments. Others follow the federal approach. Before citing an unpublished decision in any state court, check that jurisdiction’s rules of appellate procedure. Getting this wrong can draw sanctions or, at minimum, an irritated judge.
Verifying Whether a Case Is Still Good Law
Finding a case in a reporter is only half the job. A decision that looked like solid authority when published might have been overruled, distinguished, or limited by later courts. Citing a case without checking its current status is one of the most damaging mistakes a legal researcher can make, and courts have sanctioned attorneys for it.
Citator services exist for this. Westlaw’s KeyCite and LexisNexis’s Shepard’s Citations are the two dominant tools. Both trace every subsequent case that has cited the opinion and flag negative treatment. KeyCite uses a color-coded flag system: red means the case has been overruled or reversed on at least one point of law, yellow means some negative history without reversal, and a green “C” means citing references exist with no negative treatment. Shepard’s uses a similar visual system with its own symbols.
Free alternatives exist with tradeoffs. Google Scholar’s “How Cited” feature shows which later cases reference an opinion, but it isn’t as comprehensive as the commercial citators and doesn’t give the same clear positive-or-negative treatment signals. CourtListener, run by the nonprofit Free Law Project, offers a growing database of federal and state opinions with basic citation tracking. These are useful for preliminary research, but anyone filing a brief should verify case validity through a professional citator. Most public law libraries provide free access to Westlaw or LexisNexis on in-house terminals.
Where to Access Case Law Reporters
The traditional route is a law library. Every accredited law school maintains a physical collection of reporters, and most county law libraries do as well. These libraries are generally open to the public, and many employ reference librarians who can walk you through the volumes. Photocopying typically runs $0.10 to $0.60 per page.
Subscription Databases
Westlaw and LexisNexis remain the professional standard for digital research. Both offer the full text of reported opinions, integrated citator tools, headnotes, and advanced search. LexisNexis advertises plans starting around $114 per month for basic state caselaw access, with more comprehensive packages running higher. Westlaw uses a similar tiered model. Solo practitioners and small firms often find these costs significant.
Free Digital Sources
Several free options have narrowed the gap. Google Scholar’s case law search covers U.S. Supreme Court opinions, federal district and appellate opinions, and state appellate and supreme court opinions. It’s useful for finding opinions by keyword or party name, though it lacks the sophisticated research tools of paid platforms.
For federal court filings, PACER (Public Access to Court Electronic Records) provides access to dockets, motions, orders, and opinions from every federal court. Documents cost $0.10 per page with a $3.00 cap per document, and fees are waived entirely if you accrue $30 or less in a calendar quarter.5PACER: Federal Court Records. PACER Pricing: How Fees Work For casual researchers, that waiver often covers everything you need.
Many courts now publish opinions directly on their own websites within days of issuance. The Supreme Court posts slip opinions on the day they’re announced, and most federal circuit courts maintain searchable databases of recent and archived opinions. Between court websites, Google Scholar, and PACER, a determined researcher can accomplish a great deal without a subscription.