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About Pittsburgh



Pittsburgh is the seat of Allegheny County and with a population of 306,211 is the second-largest city in the U.S. state of Pennsylvania. With a metropolitan CSA population of 2,661,369, it is the largest in both the Ohio Valley and Appalachia and the 20th-largest in the U.S. Pittsburgh is known as both "the Steel City" for its more than 300 steel-related businesses and "the City of Bridges" for its world-record 446 bridges. The city features 30 skyscrapers, 2 inclined railways, a pre-revolutionary fortification, and the source of the Ohio at the confluence of the
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