McDonaldland was the 1970s McDonald's advertising world that included characters such as Grimace and the Hamburglar.
McDonaldland presented McDonald's as a fantasy setting populated by restaurant-themed characters. Ronald McDonald served as its central figure, while the Hamburglar, Grimace, Mayor McCheese, Birdie, and others appeared in commercials, packaging, playgrounds, and promotional materials.
The concept helped McDonald's build a connected family-oriented brand rather than relying only on pictures of food. Each character had recognizable visual traits and a simple role that children could understand quickly.
McDonaldland is sometimes confused with McWorld, a later campaign and promotional concept. McDonaldland refers specifically to the earlier fictional setting and its recurring cast of characters. Its importance lies in how it turned branding into an imaginative world.