National Mutual Insurance Company v. Tidewater Transfer Company
Supreme Court of the United States
Argued November 8, 1948 Decided June 20, 1949
Full case name	National Mutual Insurance Company v. Tidewater Transfer Company
Citations	337 U.S. 582 (more) 69 S. Ct. 1173; 93 L. Ed. 1556; 1949 U.S. LEXIS 2924
Holding
28 U.S.C. § 1332(d), treating citizens of United States territories as citizens of a state for the purpose of establishing diversity jurisdiction, is constitutional.
Court membership
Chief Justice Fred M. Vinson Associate Justices Hugo Black · Stanley F. Reed Felix Frankfurter · William O. Douglas Frank Murphy · Robert H. Jackson Wiley B. Rutledge · Harold H. Burton
Case opinions
Plurality	Jackson, joined by Black, Burton
Concurrence	Rutledge, joined by Murphy
Dissent	Vinson, joined by Douglas
Dissent	Frankfurter, joined by Reed
Laws applied
28 U.S.C. § 1332(d)

National Mutual Insurance Company v. Tidewater Transfer Company, 337 U.S. 582 (1949), was a United States Supreme Court case that upheld the constitutionality of 28 U.S.C. §1332(e). §1332(e) treats citizens of United States territories as citizens of a state for the purpose of establishing diversity jurisdiction.^[1]