For part of the 20th century, Pittsburgh was behind only New York City and Chicago in corporate headquarters employment it had the most U.S. Additionally, it is a leader in computing, electronics, and the automotive industry. Īside from steel, Pittsburgh has led in the manufacturing of other important materials-aluminum and glass-and in the petroleum industry. The city developed as a vital link of the Atlantic coast and Midwest, as the mineral-rich Allegheny Mountains led to the region being contested by the French and British empires, Virginians, Whiskey Rebels, and Civil War raiders. The city features 30 skyscrapers, two inclined railways, a pre-revolutionary fortification and Point State Park at the confluence of the rivers.
steel industry, and as the "City of Bridges" for its 446 bridges.
Pittsburgh is known both as "the Steel City" for its dominant role in the history of the U.S. Pittsburgh is located in southwest Pennsylvania at the confluence of the Allegheny River and the Monongahela River, which combine to form the Ohio River. It is the principal city of the greater Pittsburgh–New Castle–Weirton combined statistical area that extends into Ohio and West Virginia. It is the largest city of the Greater Pittsburgh metropolitan area of Western Pennsylvania its population of 2.37 million is the largest in both the Ohio Valley and Appalachia, the second-largest in Pennsylvania, and the 27th-largest in the U.S. with a population of 302,971 as of the 2020 census. It is the most populous city in both Allegheny County and Western Pennsylvania, the second-most populous city in Pennsylvania after Philadelphia, and the 68th-most populous city in the U.S. Pittsburgh ( / ˈ p ɪ t s b ɜːr ɡ/ PITS-burg) is a city in the Commonwealth of Pennsylvania and the county seat of Allegheny County.
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