Westmoreland County PA Information


Westmoreland County Subdivisions

Westmoreland County PA Data & Demographics (As of July 1, 2023)


Total Population 351,269 (100%)
Population in Households 345,060 (98.2%)
Population in Families 277,176 (78.9%)
Population in Group Quarters1 6,209 ( 1.8%)
Population Density 342
Diversity Index2 19


Median Household Income $66,415
Average Household Income $93,522
% of Income for Mortgage4 20%
Per Capita Income $40,722
Wealth Index5 91
Socioeconomic Status Index6 Moderate (55.0)


Total HU (Housing Units) 167,837 (100%)
Owner Occupied HU 116,624 (69.5%)
Renter Occupied HU 36,111 (21.5%)
Vacant Housing Units 15,102 ( 9.0%)
Median Home Value $222,379
Average Home Value $259,342
Housing Affordability Index3 112


Total Households 152,735
Average Household Size 2.26
Family Households 97,796
Average Family Size 3.00
  1. Group Quarters - a place where people live or stay in a group living arrangement. Includes college residents halls, nursing facilities, military barracks, and correctional facilities.
  2. The Diversity Index is a scale of 0 to 100 that represents the likelihood that two persons, chosen at random from the same area, belong to different races or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.
  3. The Housing Affordability Index base is 100 and represents a balance point where a resident with a median household income can normally qualify to purchase a median price home. Values above 100 indicate increased affordability, while values below 100 indicate decreased affordability.
  4. The % of Income for Mortgage quantifies the percentage of median household income dedicated to mortgage payments on a home priced at the median value (assuming a 30-year mortgage and a 20% down payment).
  5. The Wealth Index is based on a number of indicators of affluence including average household income and average net worth, but it also includes the value of material possessions and resources. It represents the wealth of the area relative to the national level. Values above or below 100 represent above-average wealth or below-average wealth compared to the national level.
  6. The Socioeconomic Index ranges from zero (lowest relative status) to 100 (highest relative status). This measure quantifies disparities in social position of an area's inhabitants and is built from a broad range of demographic, housing, and socioeconomic inputs. More information on this measure can be found in Esri's SEI tutorial.


2020-2023 2023-2028
Population -0.30% -0.22%
Households -0.02% 0.06%
Families   0.00%
Median Household Income   3.43%
Per Capita Income   3.27%
Owner Occupied HU   0.26%


Westmoreland County PA - Peer Comparisons by Rank and Percentile

The table below compares Westmoreland County to the other 67 counties and county equivalents in Pennsylvania by rank and percentile using July 1, 2023 data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.

Variable Description Rank Percentile
Total Population # 11 85th
Population Density # 18 75th
Median Household Income # 24 66th
Housing Affordability Index # 24 36th
Per Capita Income # 10 87th
Diversity Index # 43 37th

Additional comparisons and rankings can be made with a VERY EASY TO USE Pennsylvania Census Data Comparison Tool.

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