Map of Westmoreland County, Pennsylvania

Westmoreland County is a county in the Commonwealth of Pennsylvania, United States. As of the 2020 census, the population was 364,663. The county seat is Greensburg. 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.

Westmoreland County is included in the Pittsburgh Metropolitan Statistical Area.

Westmoreland County overview:
Name:	Westmoreland County
FIPS code:	42-129
State:	Pennsylvania
Founded:	February 26, 1773
Named for:	Westmorland
Seat:	Greensburg
Largest city:	Hempfield Township
Total Area:	1,036 sq mi (2,680 km²)
Land Area:	1,028 sq mi (2,660 km²)
Total Population:	354,663
Population Density:	345/sq mi (133/km²)
Time zone:	UTC−5 (Eastern)
Summer Time Zone (DST):	UTC−4 (EDT)
Website:	www.co.westmoreland.pa.us

Westmoreland County location map. Where is Westmoreland County?

Westmoreland County location on the U.S. Map. Where is Westmoreland County. — Location of Westmoreland County in the the United States.

Westmoreland County location on the Pennsylvania map. Where is Westmoreland County. — Location of Westmoreland County in Pennsylvania.

History

Formed from Lancaster, Northumberland, and later Bedford counties, Westmoreland County was founded on February 26, 1773, and was the first county in the Pennsylvania colony 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.

Westmoreland County Road Map

Westmoreland CountyStreet Map. — Street map of Westmoreland County, Pennsylvania. Source: OpenStreetMap (OSM)

Westmoreland CountyMap — Westmoreland Countypolitical map.

Geography

According to the U.S. Census Bureau, the county has a total area of 1,036 square miles (2,680 km), of which 1,028 square miles (2,660 km) is land and 8.5 square miles (22 km) (0.8%) is water. Westmoreland has a humid continental climate (Dfa/Dfb). Average monthly temperatures in Greensburg range from 28.7 °F in January to 71.8 °F in July, while in Murrysville they range from 29.4 °F in January to 73.1 °F in July, in Latrobe they range from 28.9 °F in January to 72.0 °F in July, and in Ligonier they range from 28.1 °F in January to 71.1 °F in July.