Nighttime view from Mount Washington in Pittsburgh Wallpapers

Pittsburgh is the county seat of Allegheny County, Pennsylvania, United States, and the second largest city in the state. Its population was 334,563 at the 2000 census; by 2006, it was estimated to have fallen to 312,819. The population of the seven-county metropolitan area is 2,462,571. The city's Downtown retains substantial economic influence, ranking at 25th in the nation for jobs within the urban core (and is 6th in job density).