Hancock, Attorney General of Kentucky v. Train, Administrator, Environmental Protection Agency, et al.
Decided June 7, 1976. Byron Raymond White delivered the opinion of the Court.
Docket 74-220 · 426 U.S. 167 (1976) · Cited 267 times
We don’t yet publish a summary of this opinion — read the official text below for the Court’s holding and reasoning.
How the Justices voted
Decided 7–2.
Majority · 7
- Byron Raymond White · delivered the opinion of the Court
- Harry Andrew Blackmun
- John Paul Stevens
- Lewis Franklin Powell Jr.
- Thurgood Marshall
- Warren Earl Burger
- William Joseph Brennan Jr.
Dissenting · 2
- Potter Stewart · filed a dissenting opinion
- William Hubbs Rehnquist · filed a dissenting opinion
“Concurring” means agreeing with the outcome; any split shown is the Court’s judgment, not each Justice’s reasoning. Source: the Supreme Court Database (Spaeth et al.), Washington University.
Precedents cited
Supreme Court decisions this opinion relies on, ordered by how often it cites each. Cases in our collection link through; others are named.
- Train v. Natural Resources Defense Council, Inc. · 421 U.S. 60 (1975)
- Alabama v. King & Boozer · 314 U.S. 1 (1941)
- Public Util. Comm'n of Cal. v. United States · 355 U.S. 534 (1958)
- Paul v. United States · 371 U.S. 245 (1963)
- Kern-Limerick, Inc. v. Scurlock · 347 U.S. 110 (1954)
- Johnson v. Maryland · 254 U.S. 51 (1920)
- Penn Dairies, Inc. v. Milk Control Comm'n of Pa. · 318 U.S. 261 (1943)
- Mayo v. United States · 319 U.S. 441 (1943)
- United States v. Herron · 87 U.S. 251 (1874)
Cited by
Later Supreme Court opinions in our collection that cite this case.
- Goodyear Atomic Corp. v. Miller · 486 U.S. 174 (1988)
- United States Department of Energy v. Ohio · 503 U.S. 607 (1992)
- Trump v. Vance · 591 U.S. 786 (2020)
- United States v. Washington · 596 U.S. 832 (2022)
- Clinton v. Jones · 520 U.S. 681 (1997)
- North Dakota v. United States · 495 U.S. 423 (1990)
- Rice v. Rehner · 463 U.S. 713 (1983)
Official text
Read the official opinion (U.S. Reports, govinfo.gov)
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Source: the U.S. Reports via govinfo.gov; authoring Justice and vote lineup from the Supreme Court Database (Washington University). Citation count from the Free Law Project’s CourtListener bulk data. Data last verified 2026-07-03. Informational only; verify against the primary source before relying. Not a consumer report (FCRA).