Springfield is the fictional city in which the animated American sitcom The Simpsons is set. Springfield is a large city in an unspecified state near a large body of water. The geography of Springfield and its surroundings are flexible, changing to address whatever an episode’s plot calls for. In The Simpsons' universe, Time magazine is said to have done a cover story on Springfield entitled "America's Worst City;" Newsweek is said to have characterized the city as "America's Crud Bucket".

There are no geographical coordinates or references to US states that might identify which part of the country it represents. Nevertheless, fans have tried to determine the town's location by taking the town's characteristics, surrounding geography, and nearby landmarks as clues. Whenever an episode attempts to show or say what state it is in, the audience is somehow prevented from learning what is revealed. In one episode Lisa says that the location is a mystery and instructs the viewer to follow the clues to figure it out. As a response, the show has become intentionally evasive in regard to Springfield's location. The name "Springfield" is a common one in America and appears in over half of the states.