Where is danville from the show Phineas and Ferb?

Danville, the fictional town where Phineas and Ferb live, is located in the tri-state area, which is a general term for the area where New York, New Jersey, and Connecticut meet.

While the exact location within the tri-state area is never explicitly stated, several clues point to it being somewhere in Connecticut. For instance, the show features a town called "Monotonia" which appears to be based on the real-life town of Monkton, Connecticut. Additionally, the characters often travel to New York City for events and outings, which would be a more convenient distance from Connecticut than New Jersey.

However, it's important to remember that Danville is a fictional location and its exact geographical placement is ultimately up to the viewer's interpretation.