Kansas v. Utilicorp United Inc.

497 U.S. 199 · Decided June 21, 1990 · Supreme Court of the United States

At a glance

Kansas v. Utilicorp United Inc. was decided on June 21, 1990 by a vote of 5–4. The Court affirmed the lower court's decision. Justice Anthony M. Kennedy wrote the opinion of the Court. SCDB classifies its main issue as “Antitrust” in the Economic Activity area.

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

Kansas et al. v. Utilicorp United Inc.

SCDB identifiers: case 1989-124, docket 1989-124-01.

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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