Miller v. Florida

482 U.S. 423 · Decided June 9, 1987 · Supreme Court of the United States

At a glance

Miller v. Florida was decided on June 9, 1987 unanimously (9–0). The Court reversed the lower court's decision and remanded the case. Justice Sandra Day O'Connor wrote the opinion of the Court. SCDB classifies its main issue as “Ex post facto (state)” in the Criminal Procedure area. SCDB records that the Court declared a state or territorial law, regulation or constitutional provision unconstitutional.

Read the opinion

• CourtListener (Free Law Project) — opinion text
• Library of Congress — official U.S. Reports scan

Case details

How the Justices voted

Full case caption

Miller v. Florida

SCDB identifiers: case 1986-123, docket 1986-123-01.

Related decisions

Other cases on “Ex post facto (state)”

• Collins v. YoungbloodAltered precedent
  497 U.S. 37Decided June 21, 19909–0William H. Rehnquist
• Weaver v. GrahamLaw held unconstitutional
  450 U.S. 24Decided February 24, 19819–0Thurgood Marshall
• California Department of Corrections v. Jose Ramon Morales
  514 U.S. 499Decided April 25, 19957–2Clarence Thomas
• Kenneth Lynce v. Hamilton MathisLaw held unconstitutional
  519 U.S. 433Decided February 19, 19979–0John Paul Stevens
• Dobbert v. Florida
  432 U.S. 282Decided June 17, 19776–3William H. Rehnquist
• J. Wayne Garner v. Robert L. Jones
  529 U.S. 244Decided March 28, 20006–3Anthony M. Kennedy

See all

Cases on the same legal provision: Article I, Section 10 (state bill of attainder or ex post facto law)

• Scott Leslie Carmell v. TexasLaw held unconstitutional
  529 U.S. 513Decided May 1, 20005–4John Paul Stevens
• Mark Seling v. Andre Brigham Young
  531 U.S. 250Decided January 17, 20018–1Sandra Day O'Connor
• Garner v. Board of Public Works of Los Angeles
  341 U.S. 716Decided June 4, 19515–4Tom C. Clark

Same Term, same area (Criminal Procedure)

• Colorado v. Connelly
  479 U.S. 157Decided December 10, 19867–2William H. Rehnquist
• Griffith v. Kentucky
  479 U.S. 314Decided January 13, 19876–3Harry A. Blackmun
• Colorado v. Bertine
  479 U.S. 367Decided January 14, 19877–2William H. Rehnquist
• Connecticut v. Barrett
  479 U.S. 523Decided January 27, 19877–2William H. Rehnquist
• California v. Brown
  479 U.S. 538Decided January 27, 19875–4William H. Rehnquist
• Colorado v. Spring
  479 U.S. 564Decided January 27, 19877–2Lewis F. Powell Jr.

See all

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