What title did the cheese-headed McDonaldland character hold?

The cheese-headed McDonaldland character was called Mayor McCheese.

Mayor McCheese was a humanlike character with a large cheeseburger-shaped head, a suit, and a mayoral role. McDonald’s used him in commercials and promotional material as part of the fictional McDonaldland setting, where the restaurant’s characters interacted in a shared fantasy community.

His title made the character easy to identify and helped give McDonaldland a mock civic structure. That was a common feature of children’s advertising worlds: familiar adult roles such as mayor, police officer, or farm worker were adapted into playful branded characters.

Mayor McCheese is sometimes confused with the Hamburglar or Grimace because all three belonged to McDonaldland. Unlike those characters, however, his defining identity was his elected-official title and cheeseburger head.