The fictional world inhabited by Ronald McDonald and his advertising friends was called McDonaldland.
McDonaldland was created as a fantasy setting for McDonald’s television commercials and promotions. It populated the brand with characters including Grimace, the Hamburglar, Mayor McCheese, Birdie the Early Bird, and the Fry Kids. Each character helped turn menu items or restaurant themes into recognizable personalities.
The campaign was especially prominent from the 1970s onward and gave McDonald’s a distinctive storytelling system for children. Restaurants, playgrounds, packaging, and merchandise could all connect to the same imaginary world.
McDonaldland is sometimes confused with a restaurant name or a formal theme-park brand. It was primarily an advertising universe, not a separate chain. Its characters also changed over time, and some were retired as McDonald’s marketing moved toward simpler, more product-focused campaigns.