McDonaldland was the fictional world where Ronald McDonald and other McDonald's mascots lived in 1960s and later advertising.
The setting gave McDonald's a shared story universe for characters such as Ronald McDonald, Grimace, the Hamburglar, Mayor McCheese, and Birdie. Commercials presented the characters in colorful landscapes filled with visual references to restaurant foods and branding elements.
McDonaldland was designed primarily to appeal to children, but it also created a consistent framework for television spots, packaging, promotional merchandise, and restaurant events. Instead of advertising only individual menu items, the campaign made the brand feel like a recognizable place with recurring personalities.
The name is sometimes incorrectly treated as the title of one mascot or one specific restaurant. It was the name of the fictional setting itself. Character lineups and designs changed over time, so not every McDonaldland figure appeared in every advertising era.