| Litigants: | New Hampshire v. Maine |
| Arguedate: | April 19 |
| Argueyear: | 1977 |
| Decidedate: | June 14 |
| Decideyear: | 1977 |
| Fullname: | New Hampshire v. Maine |
| Usvol: | 426 |
| Uspage: | 363 |
| Parallelcitations: | 96 S. Ct. 2113; 48 L. Ed. 2d 701; 1976 U.S. LEXIS 60 |
| Outcome: | Consent decree stipulated between parties and agreed to by parties is permissible under Vermont v. New York, . States are not adjusting the boundary between them, which was fixed by the 1740 decree; the consent decree simply locates precisely the already existing boundary, and neither State is enhancing its power and threatening supremacy of the Federal Government. |
| Majority: | Brennan |
| Joinmajority: | Burger, Stewart, Marshall, Powell, Rehnquist |
| Dissent: | White |
| Joindissent: | Blackmun, Stevens |
New Hampshire v. Maine, 426 U.S. 363 (1977), was an original jurisdiction case in which the Supreme Court of the United States held that the boundary between the states of New Hampshire and Maine was fixed by the 1740 decree of King George II of Great Britain.[1] Both sides entered into a consent decree which was accepted by the special master appointed by the Court.