Which McDonald's mascot is the fictional mayor of McDonaldland?

Mayor McCheese is the fictional mayor of McDonaldland.

McDonald's introduced Mayor McCheese as part of its fantasy world of branded characters. He was designed as a person with a large cheeseburger for a head, wearing a mayoral sash and formal clothing. The character appeared in commercials and other promotional material alongside Ronald McDonald, Grimace, the Hamburglar, and other McDonaldland residents.

The character's design turned a menu item into a visual branding device. Instead of simply showing a cheeseburger in a product advertisement, McDonald's made the food item part of the story world surrounding its restaurants. That approach helped give the brand a recognizable cast and a setting that could be reused across campaigns.

Mayor McCheese is sometimes confused with Officer Big Mac, another McDonaldland character whose name refers to a different menu product. The mayor's defining clue is the cheeseburger-shaped head and his civic title.