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Giaccio v. Pennsylvania

382 U.S. 399 · Decided January 19, 1966 · Supreme Court of the United States

Record summary. This page is generated from the Supreme Court Database’s coded data about the case. It describes who decided what, not the Court’s reasoning. Read the opinion itself before relying on it. Not legal advice.

At a glance

Giaccio v. Pennsylvania was decided on January 19, 1966 unanimously (9–0). The Court reversed the lower court's decision and remanded the case. Justice Hugo L. Black wrote the opinion of the Court. SCDB classifies its main issue as “Due process, miscellaneous” in the Due Process area. SCDB records that the Court declared a state or territorial law, regulation or constitutional provision unconstitutional.

Read the opinion

Case details

Citations
382 U.S. 399 · 86 S. Ct. 518 · 15 L. Ed. 2d 447 · 1966 U.S. LEXIS 2526
Docket number
47
Decided
January 19, 1966
Argued
December 6, 1965
Court era
Warren Court
Decision type
Opinion of the Court (orally argued)
Disposition
Reversed and remanded
Outcome for petitioner
The petitioning party received a favorable disposition
Vote
9–0 (unanimous)
Majority opinion
Hugo L. Black
Opinion assigned by
Earl Warren
How the case arrived
Appeal
Issue area
Due Process
Legal provision
Fourteenth Amendment (due process)
Type of law
Constitutional amendment
Held unconstitutional
A state or territorial law, regulation or constitutional provision
Decision direction (SCDB)
Liberal what this means

How the Justices voted

JusticeVoteSeparate writing
Justice Hugo L. BlackMajorityWrote an opinion
Justice William O. DouglasMajority
Justice Tom C. ClarkMajority
Chief Justice Earl WarrenMajority
Justice John M. Harlan IIMajority
Justice William J. Brennan Jr.Majority
Justice Potter StewartSpecial concurrenceWrote an opinion
Justice Byron R. WhiteMajority
Justice Abe FortasSpecial concurrenceWrote an opinion

Full case caption

Giaccio v. Pennsylvania

SCDB identifiers: case 1965-042, docket 1965-042-01.

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Source: Supreme Court Database, 2026 Release 01 (data file dated September 8, 2026). Imported into CaseTrail November 5, 2026. Coverage: decisions from the 1946 through 2025 Terms. Methodology · Report an error