Sebastian "Baste" Zimmerman Duterte is a Filipino politician serving as Mayor of Davao City since June 30, 2022. He previously served as the city's vice mayor from 2019 to 2022. He is the youngest son of 16th president Rodrigo Duterte from former wife Elizabeth Zimmerman, and the younger brother of vice president Sara Duterte.

The mayor of Davao City is the chief executive of the government of Davao City in Davao Region, Philippines. The mayor leads the city's departments in executing ordinances and delivering public services. The mayorship is a three-year term and each mayor is restricted to three consecutive terms, totalling nine years, although a mayor can be elected again after an interruption of one term.