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Westmoreland County Pennsylvania Genealogy and History

Founded: February 26, 1773

Named For: Westmorland

County Seat: Greensburg

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Westmoreland County, Pennsylvania was formed from, successively, Lancaster, Northumberland, and later Bedford counties, Westmoreland County was founded on February 26, 1773, and was the first county in the colony of Pennsylvania whose entire territorial boundary was located west of the Allegheny Mountains. Westmoreland County originally included the present-day counties of Fayette, Washington, Greene, and parts of Beaver, Allegheny, Indiana, and Armstrong counties. It is named after Westmorland, a historic county of England.


Under Pennsylvania law, there are four types of incorporated municipalities: cities, boroughs, townships, and, in at most two cases, towns. The following cities, boroughs and townships are located in Westmoreland County:

Cities: Arnold, Greensburg (county seat), Jeannette, Latrobe, Lower Burrell, Monessen, New Kensington.

Boroughs: Adamsburg, Arona, Avonmore, Bolivar, Delmont, Derry, Donegal, East Vandergrift, Export, Hunker, Hyde Park, Irwin, Laurel Mountain, Ligonier, Madison, Manor, Mount Pleasant, Murrysville, New Alexandria, New Florence, New Stanton, North Belle Vernon, North Irwin, Oklahoma, Penn, Scottdale, Seward, Smithton, South Greensburg, Southwest Greensburg, Sutersville, Trafford (partly in Allegheny County), Vandergrift, West Leechburg, West Newton, Youngstown, Youngwood.

Townships: Allegheny, Bell, Cook, Derry, Donegal, East Huntingdon, Fairfield, Hempfield, Ligonier, Loyalhanna, Mount Pleasant, North Huntingdon, Penn, Rostraver, St. Clair, Salem, Sewickley, South Huntingdon, Unity, Upper Burrell, Washington.

Census-designated places are geographical areas designated by the U.S. Census Bureau for the purposes of compiling demographic data. They are not actual jurisdictions under Pennsylvania law. Other unincorporated communities, such as villages, may be listed here as well.

Census-designated places: Bradenville, Calumet, Collinsburg, Crabtree, Fellsburg, Grapeville, Harrison City, Herminie, Hostetter, Lawson Heights, Level Green, Loyalhanna, Lynnwood Pricedale, Mammoth, Millwood, Norvelt, St. Vincent College, Slickville, Webster, Wyano, Yukon.

Unincorporated communities: Acme, Alverton, Ardara, Armbrust, Baggaley, Bessemer, Blackstone, Boquet, Bovard, Brenizer, Carbon, Claridge, Forbes Road, Greenwald, Hannastown, Hopewell, Hutchinson, Jacobs Creek, Jones Mills, Kecksburg, Larimer, Laughlintown, Lloydsville, Lowber, Luxor, Marguerite, Morewood, Moween, New Derry, Pandora, Peanut, Pleasant Unity, Reagantown, Rector, Reduction, Ruffs Dale, Salina, Scab Hill, Seger, Southwest, Stahlstown, Standard Shaft, Tarrs, Torrance, Trauger, Turkeytown, United, Wendel, Westmoreland City, Whitney, Yohoghany.

Former community: Franklin Township - now known as Murrysville, Pennsylvania.

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