The home of the Simpsons is named after the neighboring town where Groening grew up in Portland. "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," Groening said in an interview with Smithsonian Magazine.
"When I grew up, I realized it was just a fictitious name," continued Groening, who lived on Evergreen Terrace as a child, the same name of the street the Simpsons live on. "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."
Springfield's location has been a long-running joke on the series, with characters often referencing multiple bordering states from across the country, or being interrupted when almost revealing its actual location.