Which advertising agency created McDonald's McDonaldland campaign, introduced in 1971?

Needham Harper Steers created McDonald’s McDonaldland campaign, introduced in 1971.

McDonaldland was a fictional advertising setting populated by characters connected with McDonald’s products and restaurants. Ronald McDonald served as the central figure, while characters including Grimace, the Hamburglar, Mayor McCheese, and Birdie appeared in later advertising and promotional material.

Needham Harper Steers was the advertising agency credited with developing the campaign. The agency also worked on McDonald’s major television advertising during the period when the company was expanding its family-oriented brand identity.

McDonaldland is sometimes mistaken for a real theme park or a single film. It was primarily an advertising universe used across commercials, merchandise, packaging, and restaurant promotions. Its fictional setting helped McDonald’s connect its food brand with recurring characters and stories.