Which advertising agency created the original McDonaldland characters for McDonald’s?

Needham Harper & Steers created the original McDonaldland characters for McDonald’s.

McDonaldland was developed in the early 1970s as a colorful advertising setting populated by Ronald McDonald and food-themed characters. The concept gave McDonald’s a distinctive fictional world that could connect television commercials, restaurant promotions, toys, and children’s marketing.

Needham Harper & Steers, the advertising agency working with McDonald’s at the time, helped create the setting and its cast. Characters such as Mayor McCheese, Officer Big Mac, the Hamburglar, and Grimace became recognizable parts of the company’s advertising identity.

McDonaldland is sometimes confused with a separate children’s television franchise because its characters appeared in many formats. It was primarily a McDonald’s advertising concept, rather than an independent fictional universe created for cinema or television.