Mayor McCheese was the McDonald's character based on a cheeseburger who served as the mayor of McDonaldland.
The character had a large cheeseburger for a head, a human-like body, and formal mayoral clothing. He appeared in McDonaldland advertising alongside characters such as Ronald McDonald, Grimace, and the Hamburglar.
Mayor McCheese gave McDonald's a humorous civic figure within its fictional advertising world. The character's title made him easy to identify and helped the company present McDonaldland as a complete fantasy community rather than simply a collection of unrelated mascots.
He is sometimes confused with Officer Big Mac, another McDonaldland character whose head was shaped like a Big Mac. The distinction is straightforward: Mayor McCheese represented a cheeseburger and held the mayoral office, while Officer Big Mac was associated with law enforcement.