E. Harold Hallows

E. Harold Hallows (April 20, 1904 – September 11, 1974) was an American jurist from Wisconsin.

Born in Fond du Lac, Wisconsin, Hallows graduated from Marquette University and received his J.D. degree from the University of Chicago Law School. Hallows practiced law in Milwaukee, Wisconsin and taught at the Marquette University Law School. In 1958, Hallows was appointed to the Wisconsin Supreme Court and became chief justice of the court in 1968 serving until his retirement in 1974.

Hallows authored the Court's opinion in the influential case Breunig v. American Family Insurance Company, which established the rule that a sudden mental incapacity, of which the defendant had no foreknowledge, was an adequate defense to tort liability. This rule is often known as the Breunig exception.