For nearly a quarter of a century, we've been been plagued by one nagging question: Where, oh where, is Springfield ("Meanest Town in America")?

The town's location has been a recurring joke, with viewers teased repeatedly by the writers of The Simpsons. But now, at long last, the mystery has been solved, by none other than creator Matt Groening. In an interview with Smithsonian magazine, the cartoonist finally reveals Springfield (pop. 30,720) is in his home state of Oregon.

"Springfield was named after Springfield, Oregon," he says. "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."

Asked whether he'd ever divulged that tidbit before, Groening says, "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.'”

(via Gawker)