Beacon Theatres, Inc. v. Westover, 359 U.S. 500 (1959), was a case decided by the Supreme Court of the United States dealing with jury trials in civil matters.

[1] Cornell Law School's Legal Information Institute summarized it like this:[2] In Beacon Theatres v. Westover, the Court held that a district court erred in trying all issues itself in an action in which the plaintiff sought a declaratory judgment and an injunction barring the defendant from instituting an antitrust action against it, and the defendant had filed a counterclaim alleging violation of the antitrust laws and asking for treble damages.

Subsequent jury trial of these issues would probably be precluded by collateral estoppel, hence "only under the most imperative circumstances which in view of the flexible procedures of the Federal Rules we cannot now anticipate, can the right to a jury trial of legal issues be lost through prior determination of equitable claims.

"The question was whether the exclusive agreement of Fox Theatres with the distributor Westover for first-run movies was reasonable.

This article related to the Supreme Court of the United States is a stub.