Pittsburgh, Pennsylvania, located in the United States, is the second largest city in the state and is the county seat of Allegheny County. 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. Downtown Pittsburgh retains substantial economic influence, ranking at 25th in the nation for jobs within the urban core (and is 6th in job density).
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