Which McDonald's advertising world, introduced in 1971, featured Mayor McCheese?

McDonaldland was the McDonald's advertising world introduced in 1971 that featured Mayor McCheese.

The campaign presented a colorful fictional setting populated by personified food items and other characters. Mayor McCheese, a character with a cheeseburger for a head, was one of its most recognizable figures. The setting gave McDonald's a shared imaginative world for television commercials, restaurant promotions, and merchandise.

Other McDonaldland characters included Grimace, the Hamburglar, Birdie, and the Fry Kids. Their designs and roles changed over the years, but the campaign consistently connected McDonald's food with a child-oriented fantasy setting.

McDonaldland is sometimes confused with the restaurant's broader mascot advertising, but it was a specific fictional world. Its use also led to legal disputes with the creators of the characters in the children's program H.R. Pufnstuf. The campaign remains an important chapter in McDonald's branding history.