1964 Wisconsin Supreme Court election

The 1964 Wisconsin Supreme Court election was held on Tuesday, April 7, 1964, to elect a justice to the Wisconsin Supreme Court for a ten-year term. The incumbent justice Horace W. Wilkie won re-election over challenger Howard H. Boyle Jr. Prior to the main election, a third candidate, Harry E. Larsen, was eliminated in a primary election held on March 10.

Boyle centered his candidacy on castigating Wilkie for joining the majority in the McCauley v. Tropic of Cancer ruling of early 1964, in which the court had held that the novel Tropic of Cancer by Henry Miller was not legally obscene, an outcome that had been very unpopular with the public. Boyle's decision to campaign in this manner attracted criticism accusing him of acting in violation of canon 30 of the American Bar Association's Canons of Judicial Ethics. Boyle's performance in the primary and general elections was unexpectedly competitive against Wilkie, who had originally been expected to have an easy re-election.