What city do Mike and Sulley live in during Monsters, Inc.?

Mike and Sulley live in Monstropolis, the monster-world city featured in Monsters, Inc. The city is powered by energy generated from the screams of human children, making Monsters, Incorporated central to its economy.

Monstropolis is not just a backdrop: its streets, restaurants, apartments, factories, and transit systems establish a full society parallel to the human world. Sulley and Mike work at the Monsters, Inc. factory, where scarers enter children’s bedrooms through specially assigned doors.

The name is easy to confuse with invented alternatives such as Monstertown or Scareville, but Monstropolis is the canonical city name. Metroville belongs to a different Pixar setting: it is associated with The Incredibles. The story’s main crisis begins when Boo accidentally crosses into Monstropolis, challenging the monster world’s belief that human children are dangerously toxic.