Asarco Inc. v. Idaho State Tax Commission

458 U.S. 307 · Decided June 29, 1982 · Supreme Court of the United States

At a glance

Asarco Inc. v. Idaho State Tax Commission was decided on June 29, 1982 by a vote of 6–3. The Court reversed the lower court's decision. Justice Lewis F. Powell Jr. wrote the opinion of the Court. SCDB classifies its main issue as “State or local government tax” in the Economic Activity 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

Asarco Inc. v. Idaho State Tax Commission

SCDB identifiers: case 1981-157, docket 1981-157-01.

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Same Term, same area (Economic Activity)

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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