How to Find Case Law: A Step-by-Step Guide

How do you find case law? You find case law by searching court opinions for the legal issue you are researching, filtering to the jurisdiction whose courts can bind your matter, reading the on-point cases in full, and confirming each one is still good law before you cite it. The fastest path is to describe your issue in plain language, pull the cases that actually decided that issue, and trace forward to make sure none have been overruled.

Case law, also called common law or judge-made law, is the body of written decisions courts publish when they resolve disputes. Those opinions interpret statutes, apply constitutional rules, and set the precedents that lower courts must follow. Knowing where opinions live and how to search them is the core skill of legal research, whether you are a paralegal pulling authority for a brief or a solo attorney building an argument from scratch.

Where case law lives

Court opinions are published in reporters and hosted across free and paid databases. You do not need every source, but it helps to know what each one covers.

• Free public databases. CourtListener, the Caselaw Access Project, Google Scholar, and Justia host millions of opinions at no cost. They are broad but raw: there is no plain-English question box, no holding summary, and limited treatment signals to tell you whether a case is still good law.
• Paid research platforms. Westlaw and LexisNexis carry the deepest corpus plus editorial enhancements, but seats run from $1,500 to $3,000 or more per year and pricing is sales-gated. Casetext, Fastcase, and tools like Casesearch sit in between with self-serve pricing.
• Official court sites. The U.S. Supreme Court, federal circuit courts, and most state appellate courts publish their own slip opinions, which is useful for very recent decisions. If your issue is federal, start with which circuit binds you: the guide to federal case law search maps the hierarchy.

A step-by-step method to find case law

The process is the same no matter which tool you use. Follow it in order and you will rarely miss the controlling authority.

1. Frame the legal issue, not just the facts. Translate the situation into a legal question. "My client got fired after reporting safety problems" becomes "What is the standard for a retaliatory discharge claim under [jurisdiction] law?" The sharper the question, the better your results.
2. Pick the right jurisdiction. Only courts that can bind your matter produce mandatory authority. A California trial court is bound by California appellate courts and the California Supreme Court, not by a New York decision. Filter to the forum first so you do not waste time on cases that are merely persuasive. Court structure and reporters differ enough between states that it is worth reading the local rules of the road: California case law search, Texas case law search, New York case law search, Florida case law search, Illinois case law search, Pennsylvania case law search, Ohio case law search, Georgia case law search, New Jersey case law search, Michigan case law search, Washington case law search, and Massachusetts case law search each work differently. If you are unsure which opinions actually control your court, start with what court decisions are binding in my state.
3. Search by issue. Enter your question in plain English, or use terms-and-connectors if your tool requires it. Start broad, then narrow. If you get thousands of hits, add the controlling statute, a key element, or a date limit.
4. Read the on-point cases in full. Skim the headnotes or summary to triage, but never cite from a headnote alone. Read the opinion, find the holding, and make sure the facts are close enough to yours to control.
5. Check that each case is still good law. A perfect opinion is worthless if it was later overruled. Confirm treatment before you rely on it. We cover this in depth in how to shepardize a case and confirm it is still good law.
6. Build out from the best case. A strong opinion cites the authorities that shaped it and is cited by later courts that applied it. Follow those links forward and backward to map the line of cases.

Plain-English search vs Boolean

Older databases were built around Boolean queries, where you combine terms with connectors like AND, OR, /p (same paragraph), and ! (root expander). A non-compete search might read (terminate OR fire) /p employ! AND non-compet!. It is powerful but unforgiving, and one misplaced connector returns the wrong set.

Natural-language search lets you ask the question the way you would ask a senior associate. With case law search driven by plain English, you can type "Is a non-compete enforceable against a remote contractor in California?" and get on-point precedents back. Each approach has a place, and we compare them fully in Boolean vs natural language legal search.

How to read what you find

Every case you pull arrives with a citation that tells you the court, the year, and where to find it. Edwards v. Arthur Andersen LLP, 44 Cal.4th 937 (2008) means volume 44 of the California Reports, fourth series, page 937, decided by the California Supreme Court in 2008. That case held that California voids most non-compete agreements under Business and Professions Code section 16600, which is exactly the kind of controlling authority a non-compete search should surface.

If reading a citation is new to you, start with how to read a legal citation. When you understand the parts of a cite, you can judge at a glance whether an authority is binding (a high court in your jurisdiction) or merely persuasive (an out-of-state or lower court).

Common mistakes that waste hours

Find case law faster with plain-English research

The slow part of legal research is rarely reading; it is finding the right opinions and confirming they still stand. A modern tool collapses that. With precedent finding you describe the issue and get cited authorities back with plain-language holdings, and a citation check shows the still-good-law signal on each one. For solo and small-firm lawyers who cannot justify an enterprise seat, this is the difference between a billable hour and an afternoon. See how it works or the answers in our FAQ for accuracy and source details.

Casesearch is a legal research tool, not legal advice. Always read the full opinion and verify citations before relying on them.