Who is the mayor of Hawkins in Stranger Things season 3?

The mayor of Hawkins in Stranger Things season 3 is Larry Kline.

Larry Kline, played by Cary Elwes, is Hawkins' corrupt mayor during the summer of 1985. He becomes involved with the developers behind Starcourt Mall, helping them acquire land around the town. Kline accepts bribes and cooperates with the mall's secretive interests, even as their activities endanger Hawkins residents.

Hopper and Joyce confront Kline at City Hall after discovering that he has been meeting with an enforcer connected to the Starcourt operation. Hopper pressures him into revealing what he knows, making Kline an important link between Hawkins' local government and the larger Russian plot beneath the mall.

A common mix-up is confusing Kline with Jim Hopper, who is Hawkins' police chief rather than its mayor. Dr. Brenner is associated with Hawkins National Laboratory, while Scott Clarke is the boys' science teacher. Kline's character also echoes Mayor Larry Vaughn from Jaws, another fictional mayor willing to put public safety behind economic interests.