Definition
A Circuit Court of Appeals is a federal intermediate appellate court within the United States judicial system, positioned between the federal district courts (trial courts) and the Supreme Court of the United States. These courts review decisions of the district courts within their geographic jurisdiction, as well as decisions of certain federal administrative agencies.
The United States is divided into thirteen federal judicial circuits. Eleven of these are defined by geography (the First through Eleventh Circuits), covering groupings of states and territories. The twelfth is the D.C. Circuit, which handles a disproportionate share of federal administrative and regulatory appeals given its seat in Washington. The thirteenth is the Federal Circuit, which has nationwide subject-matter jurisdiction over specialized areas including patent law, international trade, and certain claims against the federal government.
Cases are typically heard by three-judge panels drawn from the full court. A majority of the panel decides the appeal. In significant or contested cases, a court may hear a case en banc — meaning before all active judges of the circuit — to resolve intra-circuit conflicts or reconsider panel decisions.
Since 1948, these courts have been formally styled "United States Courts of Appeals" in federal statute and official usage. The popular designation "Circuit Court of Appeals" persists in everyday legal speech, historical writing, and some secondary sources, though it is technically the pre-1948 name.
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Common Confusion
The label "Circuit Court of Appeals" has caused persistent confusion across three distinct courts that have existed at different times:
1. The original federal Circuit Courts (1789–1911) were trial-level courts, not appellate courts, despite the name. They had original jurisdiction over certain federal matters and sat alongside the district courts. They were staffed in part by Supreme Court justices "riding circuit."
2. The Circuit Courts of Appeals created by the Evarts Act of 1891 were the first true intermediate federal appellate courts. These courts carried the "Circuit Court of Appeals" name officially until 1948.
3. The modern United States Courts of Appeals (1948–present) are the successor courts, renamed by the Judicial Code of 1948. These are the courts most researchers mean today when using the phrase.
State-level courts sometimes use similar terminology — several states maintain courts called "Circuit Court of Appeals" or simply "Circuit Court" — which adds another layer of confusion when working across jurisdictions or in historical sources that may conflate state and federal usage.
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Why It Matters in Research
The naming history is the primary research trap. Before 1948, the intermediate federal appellate courts were officially called "Circuit Courts of Appeals." Before 1911, there was also a separate entity called simply the "Circuit Court" at the trial level. A source from 1900 referring to a "circuit court" decision may be referring to a trial court ruling, not an appellate decision. Researchers working with pre-1948 federal materials must determine from context which institution is meant.
The abolition of the original Circuit Courts in 1911 (by the Judicial Code of that year) is a key structural boundary for corpus research. After 1911, "circuit court" in the federal system unambiguously refers to the appellate tier. Before 1911, it does not.
For tax research specifically, the circuit courts of appeals have jurisdiction over appeals from the United States Tax Court, and the governing precedent for a taxpayer is the law of the circuit in which the taxpayer resides — not the D.C. Circuit where the Tax Court sits. This produces genuine circuit splits on tax questions, and historical Tax Court decisions must be read with attention to which circuit's law would control. See Tax Court Appeals to Circuit Courts in the Encyclopedia.
For military law, the Courts of Appeals are one step in a distinct appellate hierarchy that runs through the service-level courts and the Court of Appeals for the Armed Forces (CAAF) before any possible Supreme Court review. The federal circuit courts of appeals do not sit in the ordinary military appellate chain, though they retain jurisdiction over certain collateral matters. See Military Appeals in the Encyclopedia.
Jurisdictional variations in circuit case law mean that a researcher working on a national question must identify circuit splits — areas where different circuits have reached conflicting interpretations of federal law. These splits are often the precursor to Supreme Court certiorari grants and are analytically important in their own right.
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Historical Dictionary Support
Bouvier's Law Dictionary acknowledges that "circuit court of appeals" is unknown as a classification in English courts and notes that the concept conveys different ideas depending on the state or system in which it appears. Bouvier observes that the constitution of such courts often resembles the English courts of assize and nisi prius — itinerant courts that traveled to hear cases — which is historically accurate as to the origin of the "circuit" concept: federal judges in the early republic literally traveled circuits to hold court.
Bouvier's primary treatment cross-references "Courts of the United States," reflecting that the term derives its precise meaning from federal statutory structure rather than common law inheritance. This is useful framing: unlike many common law terms that can be traced through English sources, the Circuit Court of Appeals is a creature of American statutory design, and its definition at any given moment is governed by the Judiciary Acts and their successors.
What historical dictionaries largely miss is the 1891 Evarts Act reorganization — the pivotal moment when Congress created the intermediate appellate tier specifically to relieve Supreme Court docket pressure — and the 1948 renaming. A researcher relying solely on Bouvier's without attention to those statutory inflection points will have an incomplete picture of how the institution evolved.
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Jurisdictional Note
Several states maintain courts with "circuit" in their names, and a handful use formulations like "Court of Appeals" or "Circuit Court of Appeals" at the state level. These are entirely separate from the federal courts of appeals and operate under state constitutions and statutes. When researching in a mixed state-federal corpus, the geographic context of a source almost always resolves the ambiguity, but researchers should not assume that a reference to a "circuit court of appeals" in a pre-twentieth-century source is necessarily federal.
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Encyclopedia Cross-Reference
Tax Court Appeals to Circuit Courts — The Law Mind Tax Encyclopedia (tax_178)
Military Appeals — Service Courts of Criminal Appeals, CAAF, and Supreme Court Review — The Law Mind Military, Veterans & Admiralty Law Encyclopedia (military_7)
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