Pittsburgh occupies a land area of 143.7 sq km (55.5 sq mi). Over the years it has grown primarily by annexation. Between 1868 and 1900, for example, the city increased its land area nearly 16 fold to 73 sq km (28 sq mi). In 1907 it annexed the neighboring industrial city of Allegheny, increasing its land area by 21 sq km (8 sq mi) and its population by 150,000. Average elevation of the city is 226 m (743 ft).
Pittsburgh is the center of a metropolitan area covering Allegheny, Westmoreland, Washington, Beaver, Butler, and Fayette counties, a region of 11,976 sq km (4,624 sq mi). The metropolitan area has several small cities and substantial towns, including Butler, Greensburg, McKeesport, Uniontown, and Washington. Among Pittsburgh's suburbs are Bethel Park, Fox Chapel, McCandless, Monroeville, Mount Lebanon, Penn Hills, and Sewickly. Pittsburgh has many distinct neighborhoods; 90 are officially recognized.
Microsoft® Encarta® Online Encyclopedia 2001
http://encarta.msn.com © 1997-2001 Microsoft Corporation. All rights reserved. Pittsburgh Information info
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