Boosh. Called It.

Simpsons creator explains Springfield reference:

Simpsons creator Matt Groening revealed to Smithsonian magazine which Springfield the Simpsons’ Springfield is named after.

(Via The Loop)

It was Springfield Oregon all along. Suck it every other state. Another interesting fact is that pretty much everything you know from The Simpsons is named after something in Portland — Matt Groening grew up here with his father Homer, mother Margaret, and sisters Lisa and Maggie.