Location within the U.S. state of Pennsylvania
Pennsylvania's location within the U.S.
|Founded||February 26, 1773|
|o Total||1,036 sq mi (2,680 km2)|
|o Land||1,028 sq mi (2,660 km2)|
|o Water||8.5 sq mi (22 km2) 0.8%%|
| o Estimate |
|o Density||341/sq mi (132/km2)|
|Time zone||UTC-5 (Eastern)|
|o Summer (DST)||UTC-4 (EDT)|
|Congressional districts||13th, 14th|
Westmoreland County is a county located in the U.S. state of Pennsylvania. At the 2010 census, the population was 365,169. 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.
According to the U.S. Census Bureau, the county has a total area of 1,036 square miles (2,680 km2), of which 1,028 square miles (2,660 km2) is land and 8.5 square miles (22 km2) (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. 
At the 2010 census, there were 365,169 people, 153,650 households and 101,928 families residing in the county. The population density was 355.4 per square mile (137.2/km²). There were 168,199 housing units at an average density of 163.7 per square mile (63.2/km²). The racial makeup of the county was 95.3% White, 2.3% Black or African American, 0.1% Native American, 0.7% Asian, 0.03% Pacific Islander, 0.2% from other races, and 1.2% from two or more races. 0.9% of the population were Hispanic or Latino of any race.
There were 153,650 households of which 24.5% had children under the age of 18 living with them, 52.2% were married couples living together, 10.0% had a female householder with no husband present, and 33.7% were non-families. 29.0% of all households were made up of individuals and 13.3% had someone living alone who was 65 years of age or older. The average household size was 2.32 and the average family size was 2.86.
22.3% of the population were under the age of 18, 5.1% from 18 to 24, 22.4% from 25 to 44, 31.3% from 45 to 64, and 18.9% who were 65 years of age or older. The median age was 45.1 years. For every 100 females there were 94.8 males. For every 100 females age 18 and over, there were 92.3 males.
In November 2008, there were 249,147 registered voters in Westmoreland County.
The Democratic Party had been historically dominant in county-level politics, however Westmoreland has trended Republican at the national and statewide levels. In 2000, Republican George W. Bush won 51% and Democrat Al Gore won 45%. In 2004, Republican George W. Bush won 56% and Democrat John Kerry won 43%. In 2008, Republican John McCain won 57% to Democrat Barack Obama's 41%. Governor Ed Rendell lost Westmoreland in both 2002 and 2006. In 2008 Republican Tim Krieger picked up the 57th House district left open by the retirement of Democrat Tom Tangretti. In 2010, both Pat Toomey and Tom Corbett won Westmoreland in their statewide bids. Also the GOP gained control of two more State House districts, the 54th with Eli Evankovich and the 56th with George Dunbar. In 2011, the Republican Party swept all county row offices
|55||Joseph Petrarca, Jr.||Democrat|
|32||Patrick J. Stefano||Republican|
|41||Donald C. White||Republican|
According to EdNA
A major coal strike occurred in the county in the winter of 1910-11.
There are four Pennsylvania state parks in Westmoreland County.
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:
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.
+ county seat
|Rank||City/Town/etc.||Municipal type||Population (2010 Census)
|16||Trafford (partially in Allegheny County)||Borough||3,174|
|26||North Belle Vernon||Borough||1,971|
|28||St. Vincent College||CDP||1,357|