McDonaldland was the fictional setting for McDonald’s character advertising in the 1970s.
The advertising world featured Ronald McDonald and a group of food-themed characters living in a colorful fantasy landscape. Its purpose was to give McDonald’s a connected cast and setting that could appeal especially to children while reinforcing menu imagery through character names and designs.
McDonaldland is a setting, not the name of a single mascot. Characters associated with it included Mayor McCheese, the Hamburglar, Grimace, Captain Crook, and Officer Big Mac. That distinction helps separate the fictional world from the individual figures used in its commercials.