Where is Springfield? In our hearts. Also, a specific state in the union. There are many Springfields in the United States. In which one resides the Simpson family? Matt Groening finally revealed the truth:

Springfield was named after Springfield, Oregon. The only reason is that when I was a kid, the TV show "Father Knows Best" took place in the town of Springfield, and I was thrilled because I imagined that it was the town next to Portland, my hometown. When I grew up, I realized it was just a fictitious name. I also figured out that Springfield was one of the most common names for a city in the U.S. In anticipation of the success of the show, I thought, "This will be cool; everyone will think it’s their Springfield." And they do. [...]

I don’t want to ruin it for people, you know? Whenever people say it’s Springfield, Ohio, or Springfield, Massachusetts, or Springfield, wherever, I always go, “"Yup, that’s right."

Link -via Nerd Bastards | Image: Fox