McDonald's earliest logo mascot was Speedee.
Speedee was a small chef character used in McDonald's branding during the restaurant's early years. He represented the chain's original emphasis on speedy service, a central selling point when the McDonald brothers operated their restaurant in San Bernardino, California.
The character was eventually replaced in prominence by the Golden Arches. Ronald McDonald later became the company's best-known human mascot, but he was not the figure on the earliest McDonald's logo. The Hamburglar and Grimace were introduced later as part of the McDonaldland advertising world.
Speedee is sometimes confused with later McDonald's characters because all appeared in advertising, but his role was closely tied to the restaurant's original speed-oriented identity. The character provides a link between McDonald's early service model and its later visual branding.