A beeswarm chart showing the ages of the mayors of the 50 largest U.S. cities as of June 27, 2025. The average age is 55. The youngest mayor shown is Cavalier Johnson of Milwaukee, Wis., who is 38 years old. The oldest are Barbara Lee of Oakland, Calif. and Rick Blangiardi of Honolulu, both 78. If elected, Zohran Mamdani, age 33, would be the youngest mayor of a major U.S. city by far.