We know they live in Springfield, but which one? Now there is a website determined to figuring out where The Simpsons actually live. Finally after 20 years our question can be answered.
Through process of elimination the site has eliminated all but 13 states. The site says that only direct references to a state will cause its elimination. On the site you can also find, the reason the state was eliminated, who made the reference, and on what episode the state was mentioned.