Mississippi v. Tennessee
142 S. Ct. 31 · Decided November 21, 2021 · 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
Mississippi v. Tennessee was decided on November 21, 2021 unanimously (9–0). SCDB codes the disposition as “petition denied or appeal dismissed.” Chief Justice John G. Roberts Jr. wrote the opinion of the Court. SCDB classifies its main issue as “Miscellaneous interstate conflict” in the Interstate Relations area.
Read the opinion
- CourtListener (Free Law Project) — opinion text
- Supreme Court of the United States — slip opinions, October Term 2021
Case details
- Citations
- 142 S. Ct. 31 · 211 L. Ed. 2d 230 · 2021 U.S. LEXIS 5870
- Docket number
- 22O143
- Decided
- November 21, 2021
- Argued
- October 4, 2021
- Court era
- Roberts Court
- Decision type
- Opinion of the Court (orally argued)
- Disposition
- Petition denied or appeal dismissed
- Outcome for petitioner
- The petitioning party did not receive a favorable disposition
- Vote
- 9–0 (unanimous)
- Majority opinion
- John G. Roberts Jr.
- Opinion assigned by
- John G. Roberts Jr.
- How the case arrived
- Original jurisdiction
- Issue (SCDB)
- Miscellaneous interstate conflict
- Issue area
- Interstate Relations
- Legal provision
- Article III, Section 2, Paragraph 2 (original jurisdiction)
- Type of law
- Constitution
- Decision direction (SCDB)
- Unspecifiable what this means
How the Justices voted
| Justice | Vote | Separate writing |
|---|---|---|
| Justice Clarence Thomas | Majority | |
| Justice Stephen G. Breyer | Majority | |
| Chief Justice John G. Roberts Jr. | Majority | Wrote an opinion |
| Justice Samuel A. Alito Jr. | Majority | |
| Justice Sonia Sotomayor | Majority | |
| Justice Elena Kagan | Majority | |
| Justice Neil M. Gorsuch | Majority | |
| Justice Brett M. Kavanaugh | Majority | |
| Justice Amy Coney Barrett | Majority |
Full case caption
Mississippi v. Tennessee
SCDB identifiers: case 2021-002, docket 2021-002-01.
Related decisions
Other cases on “Miscellaneous interstate conflict”
- New York v. New Jersey
- Texas v. New Mexico and Colorado
- Texas v. New Mexico and Colorado
- Montana v. Wyoming
- Kansas v. Nebraska and Colorado
- Franchise Tax Board of California v. Gilbert P. Hyatt
Cases on the same legal provision: Article III, Section 2, Paragraph 2 (original jurisdiction)
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