The 1979 Chicago mayoral election was first the primary on February 27, 1979, which was followed by the general on April 3, 1979. The election saw the election of Chicago, Illinois' first female mayor, and the first female mayor of any major American city, Jane M. Byrne. Byrne defeated Republican Wallace Johnson by a landslide 66 percent margin of victory, winning more than 82 percent of the vote.[2] Byrne's 82% of the vote is the most any candidate has received in a Chicago mayoral election.