McDonaldland was the fictional advertising world created for McDonald's characters such as Grimace and the Hamburglar.
The setting gave the restaurant chain a shared universe for television commercials, promotions, and other family-oriented marketing. Ronald McDonald served as its central human-like mascot, while the landscape included personified foods, objects, and community figures.
Characters associated with McDonaldland included Grimace, the Hamburglar, Birdie the Early Bird, and Mayor McCheese. Their designs and roles changed over time, but the setting linked them together as part of a recognizable brand mythology.
McDonaldland is sometimes confused with the name of an individual character or with the restaurant chain itself. It was the fictional world, not a menu item, mascot, or corporate division. The campaign helped McDonald's turn separate advertising figures into a connected visual identity.