State of Kansas v. State of Colorado
556 U.S. 98 · Decided March 9, 2009 · Supreme Court of the United States
Record summary. This page is generated from the Supreme Court Database’s coded data about the case. It describes who decided what, not the Court’s reasoning. Read the opinion itself before relying on it. Not legal advice.
At a glance
State of Kansas v. State of Colorado was decided on March 9, 2009 unanimously (9–0). Justice Samuel A. Alito Jr. wrote the opinion of the Court. SCDB classifies its main issue as “Non-real property dispute between states” in the Interstate Relations area.
Read the opinion
Case details
- Citations
- 556 U.S. 98 · 129 S. Ct. 1294 · 173 L. Ed. 2d 245 · 2009 U.S. LEXIS 1779
- Docket number
- 105 ORIG
- Decided
- March 9, 2009
- Argued
- December 1, 2008
- Court era
- Roberts Court
- Decision type
- Opinion of the Court (orally argued)
- Outcome for petitioner
- The petitioning party did not receive a favorable disposition
- Vote
- 9–0 (unanimous)
- Majority opinion
- Samuel A. Alito Jr.
- Opinion assigned by
- John G. Roberts Jr.
- How the case arrived
- Original jurisdiction
- Issue (SCDB)
- Non-real property dispute between states
- Issue area
- Interstate Relations
- Legal provision
- 28-1821
- Type of law
- Infrequently litigated statute
- Decision direction (SCDB)
- Unspecifiable what this means
How the Justices voted
| Justice | Vote | Separate writing |
|---|---|---|
| Justice John Paul Stevens | Majority | |
| Justice Antonin Scalia | Majority | |
| Justice Anthony M. Kennedy | Majority | |
| Justice David H. Souter | Concurrence | |
| Justice Clarence Thomas | Majority | |
| Justice Ruth Bader Ginsburg | Majority | |
| Justice Stephen G. Breyer | Majority | |
| Chief Justice John G. Roberts Jr. | Concurrence | Wrote an opinion |
| Justice Samuel A. Alito Jr. | Majority | Wrote an opinion |
Full case caption
State of Kansas, Plaintiff v. State of Colorado
SCDB identifiers: case 2008-033, docket 2008-033-01.
Related decisions
Other cases on “Non-real property dispute between states”
- State of South Carolina v. State of North Carolina
- State of Montana v. State of Wyoming and State of North Dakota
- State of Arizona v. State of California
- State of Kansas v. State of Colorado
- State of Kansas v. States of Nebraska and Colorado
- State of Montana v. State of Wyoming and State of North Dakota
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