Boundary dispute between states: Supreme Court decisions

Every U.S. Supreme Court decision from the 1946 through 2025 Terms that the Supreme Court Database classifies under the issue “Boundary dispute between states,” part of the Interstate Relations area.

Legal provisions most often involved

All 40 decisions, newest first

• State of New Jersey v. State of Delaware
  552 U.S. 597Decided March 31, 20085–3Ruth Bader Ginsburg
• State of New Hampshire v. State of Maine
  532 U.S. 742Decided May 29, 20018–0Ruth Bader Ginsburg
• State of New Jersey v. State of New York
  526 U.S. 589Decided May 17, 19999–0
• State of New Jersey v. State of New York
  523 U.S. 767Decided May 26, 19986–3David H. Souter
• State of Louisiana v. State of Mississippi
  516 U.S. 122Decided December 4, 19959–0
• Louisiana v. Mississippi
  516 U.S. 22Decided October 31, 19959–0Anthony M. Kennedy
• United States of America v. State of Louisiana
  507 U.S. 7Decided February 22, 19939–0
• State of Illinois v. Commonwealth of Kentucky
  500 U.S. 380Decided May 28, 19919–0David H. Souter
• Georgia v. South Carolina
  497 U.S. 376Decided June 25, 19909–0Harry A. Blackmun
• Kentucky v. Indiana
  474 U.S. 1Decided November 4, 19859–0
• Oklahoma v. Arkansas
  473 U.S. 610Decided July 1, 19859–0
• Arkansas v. Mississippi
  471 U.S. 377Decided April 29, 19859–0
• State of Ohio v. Commonwealth of Kentucky on Bill of Complaint
  471 U.S. 153Decided April 15, 19859–0
• Louisiana v. Mississippi
  466 U.S. 96Decided April 2, 19849–0Harry A. Blackmun
• South Dakota v. Nebraska
  458 U.S. 276Decided June 28, 19829–0
• Texas v. Oklahoma
  457 U.S. 172Decided June 14, 19829–0
• California v. Nevada
  456 U.S. 867Decided June 1, 19829–0
• Tennessee v. Arkansas
  454 U.S. 351Decided December 14, 19819–0
• California v. Arizona
  452 U.S. 431Decided June 15, 19819–0
• California v. Nevada
  447 U.S. 125Decided June 10, 19809–0William J. Brennan Jr.
• Ohio v. Kentucky
  444 U.S. 335Decided January 21, 19806–3Harry A. Blackmun
• New Hampshire v. Maine
  434 U.S. 1Decided October 3, 19779–0
• Texas v. Louisiana
  431 U.S. 161Decided May 16, 19779–0
• New Hampshire v. Maine
  426 U.S. 363Decided June 14, 19766–3William J. Brennan Jr.
• Texas v. Louisiana
  426 U.S. 465Decided June 14, 19769–0Per curiam
• Mississippi v. Arkansas
  419 U.S. 375Decided December 23, 19749–0
• Mississippi v. Arkansas
  415 U.S. 289Decided February 26, 19748–1Harry A. Blackmun
• Mississippi v. Arkansas
  415 U.S. 289Decided February 26, 19749–0
• Texas v. Louisiana
  410 U.S. 702Decided March 20, 19738–1Byron R. White
• Ohio v. Kentucky
  410 U.S. 641Decided March 5, 19738–1Harry A. Blackmun
• Michigan v. Ohio
  410 U.S. 420Decided February 22, 19739–0
• Nebraska v. Iowa
  409 U.S. 285Decided January 18, 19739–0
• Nebraska v. Iowa
  406 U.S. 117Decided April 24, 19729–0William J. Brennan Jr.
• Arkansas v. Tennessee
  399 U.S. 219Decided June 23, 19709–0
• Illinois v. Missouri
  399 U.S. 146Decided June 22, 19708–0
• Arkansas v. Tennessee
  397 U.S. 91Decided February 25, 19708–0
• Arkansas v. Tennessee
  397 U.S. 88Decided January 25, 19708–0Per curiam
• Louisiana v. Mississippi
  384 U.S. 24Decided April 18, 19669–0
• Durfee et Ux. v. Duke
  375 U.S. 106Decided December 2, 19639–0Potter Stewart
• Mississippi v. Louisiana
  350 U.S. 5Decided October 17, 19559–0

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