She served as the 50th Mayor of Chicago from April 16, 1979, until April 29, 1983.
Byrne won the Chicago mayoral election on April 3, 1979, becoming the first female mayor of the city, the second largest city in the United States at the time.
Prior to her tenure as mayor, Byrne served as Chicago's commissioner of consumer sales from 1969 until 1977, the only woman to be a part of Mayor Richard J.