Electric power regulation: Supreme Court decisions

Every U.S. Supreme Court decision from the 1946 through 2025 Terms that the Supreme Court Database classifies under the issue “Electric power regulation,” part of the Economic Activity area.

Legal provisions most often involved

All 22 decisions, newest first

• West Virginia v. Environmental Protection Agency
  142 S. Ct. 2587Decided June 30, 20226–3John G. Roberts Jr.
• Federal Energy Regulatory Commission v. Electric Power Supply Association
  577 U.S. 260Decided January 25, 20166–2Elena Kagan
• NRG Power Marketing, LLC v. Maine Public Utilities Commission
  558 U.S. 165Decided January 13, 20108–1Ruth Bader Ginsburg
• Entergy Corporation v. Riverkeeper, Inc.
  556 U.S. 208Decided April 1, 20095–4Antonin Scalia
• Morgan Stanley Capital Group Inc. v. Public Utility District No. 1 of Snohomish County
  554 U.S. 527Decided June 26, 20085–2Antonin Scalia
• Arcadia v. Ohio Power Company
  498 U.S. 73Decided November 27, 19908–0Antonin Scalia
• American Paper Institute, Inc. v. American Electric Power Service Corp.
  461 U.S. 402Decided May 16, 19838–0Thurgood Marshall
• Federal Energy Administration v. Algonquin SNG, Inc.
  426 U.S. 548Decided June 17, 19769–0Thurgood Marshall
• Federal Power Commission v. Conway Corp.
  426 U.S. 271Decided June 7, 19769–0Byron R. White
• Chemehuevi Tribe of Indians v. Federal Power Commission
  420 U.S. 395Decided March 3, 19758–0Potter Stewart
• Federal Power Commission v. New England Power Co.
  415 U.S. 345Decided March 4, 19747–0William O. Douglas
• Gulf States Utilities Co. v. Federal Power Commission
  411 U.S. 747Decided May 14, 19736–3Harry A. Blackmun
• Federal Power Commission v. Florida Power & Light Co.
  404 U.S. 453Decided January 12, 19724–2Byron R. White
• Gainesville Utilities Department v. Florida Power Corp.
  402 U.S. 515Decided May 24, 19718–0William J. Brennan Jr.
• Atlantic City Electric Co. v. United States
  400 U.S. 73Decided December 8, 19704–4
• Federal Power Commission v. Union Electric Co.
  381 U.S. 90Decided May 3, 19656–3Byron R. White
• Federal Power Commission v. Southern California Edison Co.
  376 U.S. 205Decided March 2, 19649–0William J. Brennan Jr.
• Federal Power Commission v. Tuscarora Indian Nation
  362 U.S. 99Decided March 7, 19606–3Charles E. Whittaker
• Federal Power Commission v. Sierra Pacific Power Co.
  350 U.S. 348Decided February 27, 19569–0John M. Harlan II
• Federal Power Commission v. Niagara Mohawk Power Corp.
  347 U.S. 239Decided March 15, 19544–3Harold H. Burton
• Pennsylvania Water & Power Co. v. Federal Power Commission
  343 U.S. 414Decided May 26, 19526–2Hugo L. Black
• Grand River Dam Authority v. Grand-Hydro
  335 U.S. 359Decided November 22, 19485–4Harold H. Burton

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