Duckburg in the context of "Calisota"

The Mickey Mouse universe is a fictional shared universe which is the setting for stories involving Disney cartoon characters, including Mickey and Minnie Mouse, Donald and Daisy Duck, Goofy and Pluto as the primary members (colloquially known as the "Sensational Six"), and many other characters related to them, most of them being anthropomorphic animals. The universe originated from the Mickey Mouse animated short films produced by Disney starting in 1928, although its first consistent version was created by Floyd Gottfredson in the Mickey Mouse newspaper comic strip. Real-world versions also exist in Disneyland and Tokyo Disneyland, called Mickey's Toontown. The term "Mickey Mouse universe" is not officially used by The Walt Disney Company, but it has been used by Disney comics author and animation historian David Gerstein. The Walt Disney Company typically uses terms such as Mickey & Friends or Mickey & the Gang to refer to the character franchise.

Since 1990, the city in which Mickey lives is typically called Mouseton in American comics. In modern continuity, Mouseton is often depicted as being located in the fictional U.S. state of Calisota, analogous to Northern California. This fictional state was invented by comics writer Carl Barks in 1952 as the location for Donald Duck's home city, Duckburg.

Carl Barks (March 27, 1901 – August 25, 2000) was an American cartoonist, author, and painter. He is best known for his work in Disney comic books, as the writer and artist of the first Donald Duck stories and as the creator of Scrooge McDuck. He worked anonymously until late in his career; fans dubbed him "The Duck Man" and "The Good Duck Artist". In 1987, Barks was one of the three inaugural inductees of the Will Eisner Comic Book Hall of Fame.

Barks worked for the Disney Studio and Western Publishing where he created Duckburg and many of its inhabitants, such as Scrooge McDuck (1947), Gladstone Gander (1948), the Beagle Boys (1951), The Junior Woodchucks (1951), Gyro Gearloose (1952), Cornelius Coot (1952), Flintheart Glomgold (1956), John D. Rockerduck (1961) and Magica De Spell (1961).