Everything you thought you knew about The Simpsons is a lie.

[ralphfan]

Matt Groening admits that it's Springfield, Oregon. Considering his Oregon heritage, this shouldn't be too much of a surprise. I don't know how I never realized this one.

 

[Nabber]

Not surprised. They did take a train to Seattle in the movie.

 

[Kyoko Sakura]

Source? ಠ_ಠ

 

[Raiko Horikawa]

http://www.smithsonianmag.com/arts-culture/Matt-Groening-Reveals-the-Location-of-the-Real-Springfield.html

 

[Lario]

Oh you Matt Greoning and Oregon! He has some interesting tales from his childhood.