What is the name of the tiny rodent city within Zootopia?

The tiny rodent city within Zootopia is called Little Rodentia. It is a walled urban district designed for mice and other small rodents, allowing its residents to move through a city scaled to their size without the hazards posed by much larger animals.

Judy Hopps first enters Little Rodentia while chasing Duke Weaselton, who has stolen bulbs connected to the missing-predator case. Her pursuit causes major damage in the miniature neighborhood, including the destruction of a wedding cake. Judy later saves Fru Fru, the daughter of arctic shrew crime boss Mr. Big, from being crushed by a runaway object.

The district illustrates one of Zootopia’s central ideas: the city is not simply divided into predators and prey, but also adapted to dramatically different bodies and habitats. Other major districts include Tundratown, Sahara Square, the Rainforest District, and Savanna Central. Little Rodentia is sometimes confused with a generic “mouse town,” but the film gives the neighborhood a specific proper name.