Tri-State Area

The Tri-State Area is the name of the metropolitan area surrounding Danville. The evil Dr. Doofenshmirtz often plans to create chaos in this area, not just the city of Danville itself. For such purposes, he built a scale model of the Tri-State Area.

Some businesses and groups have "Tri-State Area" in their name (e.g. Tri-State Area Public Library, Tri-State Bombers, etc.).

Location Details


In the real world, a tri-state area need not encompass whole states. For example, Chicagoland includes several counties in northeast Illinois along with a few in extreme northwest Indiana and extreme southeast Wisconsin.

In the series, one scale model depicts a geographical area of less than one square mile ("Toy to the World"). However another larger scale model was made by Dr. Doofenshmirtz; what the scale is is unknown ("That Sinking Feeling").

While describing one of his evil schemes, Doofenshmirtz used a magnifying glass in front of a map of the United States to reveal the Tri-State Area's location. The magnifying glass was positioned near the Denver, Colorado area, which is within driving distance of Mount Rushmore ("Flop Starz", "Candace Loses Her Head")

The Tri-State Area was founded by John P. Tristate, who united the Bi-State Area with an adjacent area right over there founded by Otto H. Adjacent. Tri-State Area Unification Day is celebrated on July 15. ("Hip Hip Parade")

The logo/flag for the Tri-State Area was revealed in Phineas and Ferb The Movie: Across the 2nd Dimension.

Background Information

 * Series creator Dan Povenmire has stated that Danville is not in any specific geographical location. The surrounding region changes to fit the needs of the story, leading to Danville and the Tri-State Area being near both Mount Rushmore and the Atlantic ocean at the same time.
 * The Tri-State Area may be based on Toy Story's The Tri-County Area.
 * It is revealed in "Road Trip" that the Tri-State area, despite being depicted generally in the United States, may not be in the U.S. This is displayed when Dr. Doofenshmirtz says that there was a lot of "Boom Juice" on sale in the "states".