Big City is the location where Big City Greens takes place. It is home to Cricket, Tilly, Bill, Alice, Remy and Nancy, amongst others.
Most of its features of the city is the various sizes of each buildings, for example a really tall building in the backgroud that consists of two antenna spires, while others are no more than standard business or residential buildings to make the skyline.
Some parts of the area contains a few amount of highways and expressway bridges, as well as the amnesties and buildings are usually start off with the "Big" or "Big City" prefixes in most of the episodes have either one of the Greens visit the place. Depending on the episode, there have a few expansion bridges that connects to a different parts of the city.
The city is heavily similar to most real life metropolitan areas (e.g. New York, Detroit, Los Angeles, Philadelphia, Atlanta, Chicago, San Francisco and Seattle).
According to Bill, in Welcome Home, he remember visiting the city but before it evolved differently.
It is unknown if there are any schools in Big City.
According to Chris Houghton, school hasn't been seen yet as it "splits up" the Green family and resorting to said stories told through the community center (ie. the Valentine's Day dance in "Valentine's Dance").