What is the name of the city in 'Monsters, Inc.'?

The city in 'Monsters, Inc.' is called Monstropolis. It is the main urban setting of Pixar's 2001 animated film and the home of the monsters who operate the Monsters, Incorporated factory.

Monstropolis is powered by energy collected from the screams of human children. Monsters work as “scarers,” entering children's bedrooms through magical doors connected to the factory. The society believes that human children are toxic, so even brief contact with a child is treated as a serious danger. That belief drives the panic after Boo accidentally enters the monster world.

The city is not just a backdrop: its energy crisis creates the film's central conflict. As children become harder to frighten, Monsters, Inc. struggles to produce enough power. CEO Henry J. Waternoose and rival scarer Randall Boggs respond very differently to the problem, while James P. Sullivan and Mike Wazowski eventually discover that laughter produces more energy than screams.

A common mistake is to confuse Monstropolis with Monsters, Incorporated, the company and factory located within the city. Boo Town, Scare City, and Monstersville are not official locations in the film. The prequel 'Monsters University' explores the characters' earlier lives before they work there.