Hess v. Port Authority Trans-Hudson Corporation, 513 U.S. 30 (1994), was a United States Supreme Court case regarding the nature of "arms of the state" that are entitled to sovereign immunity under the Eleventh Amendment.

The case arose from a circuit split where the Second and Third Circuits issued conflicting ruling on whether the Port Authority of New York and New Jersey was entitled to sovereign immunity.

In an opinion by Justice Ruth Bader Ginsburg, the Court held that the Port Authority is not an "arm of the state" for purposes of the Eleventh Amendment.

The Court reasoned that a judgment against the Port Authority would not be paid through by the state treaty of either New York or New Jersey.

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