Foundersville is the second largest and capital city of the Kingdom of Washingtonia. The city is one of the oldest in Washingtonia, and was established at the location of the signing of the Friendship Agreement, thus explaining the city's former name, Signing. Signing is still a neighborhood in Foundersville. The name "Foundersville" was chosen by John I in 1891 to honor the founders of the nation at the Kingdom's 100th Anniversary.
The city is situated on the western bank of the North Island Sound, within the District of Foundersville, which consists of the Foundersville metropolitan area. The city is administered by a City Manager (CM), who is chosen by and from the popularly district-elected City Council. The CM shares executive authority with the Baron of Foundersville, currently Arnold Washington. The Baron also has certain legislative and judicial authority within the city.