American Electric Power Company, Inc. v. Connecticut

564 U.S. 410 · Decided June 20, 2011 · Supreme Court of the United States

At a glance

American Electric Power Company, Inc. v. Connecticut was decided on June 20, 2011 unanimously (8–0). The Court reversed the lower court's decision and remanded the case. Justice Ruth Bader Ginsburg wrote the opinion of the Court. SCDB classifies its main issue as “Natural resources and environmental protection” 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

Did not participate: Sonia Sotomayor.

Full case caption

American Electric Power Company, Inc., et Al., Petitioners v. Connecticut et Al

SCDB identifiers: case 2010-072, docket 2010-072-01.

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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