Janus v. American Federation of State

138 S. Ct. 2448 · Decided June 27, 2018 · Supreme Court of the United States

At a glance

Janus v. American Federation of State was decided on June 27, 2018 by a vote of 5–4. The Court reversed the lower court's decision and remanded the case. Justice Samuel A. Alito Jr. wrote the opinion of the Court. SCDB classifies its main issue as “Union or closed shop” in the Unions area. SCDB codes this decision as formally altering one or more of the Court's own precedents. 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
• Supreme Court of the United States — slip opinions, October Term 2017

Case details

How the Justices voted

Full case caption

Janus v. American Federation of State, County, and Municipal Employees, Council 31

SCDB identifiers: case 2017-045, docket 2017-045-01.

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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