Mega City is a futuristic city in which every resident owns a robot to do chores and errands. It was temporarily taken over by Professor Bug.
The city's streets and sidewalks are a gray-white color. There are many white buildings covering the land. Robots walk the streets of Mega City.
Mega City has appeared in two episodes of The Backyardigans: "Robot Rampage: Part 1" and "Robot Rampage: Part 2" from season four.