Irwin, PA Profile: Facts, Map & Data


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Irwin, Pennsylvania - Basic Facts

The Borough of Irwin had a population of 3,855 as of July 1, 2017. Irwin ranks in the upper quartile for Population Density when compared to the other cities, towns and Census Designated Places (CDPs) in Pennsylvania. See peer rankings below.

The primary coordinate point for Irwin is located at latitude 40.3251 and longitude -79.6998 in Westmoreland County. The formal boundaries for the Borough of Irwin (see map below) encompass a land area of 0.84 sq. miles and a water area of 0 sq. miles. Westmoreland County is in the Eastern time zone (GMT -5). The elevation is 968 feet.

The Borough of Irwin (GNIS ID: 1215703) has a C5 Census Class Code which indicates an active incorporated place that is independent of any county subdivision and serves as a county subdivision equivalent. It also has a Functional Status Code of "A" which identifies an active government providing primary general-purpose functions.

Beneath the boundary map are tables with Irwin population, income and housing data, five-year growth projections and peer comparisons for key demographic data. The estimates are for July 1, 2017.

Neighborhood Data

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Borough of Irwin, PA Boundary Map

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Irwin, PA Data & Demographics (As of July 1, 2017)


Total Population 3,855
Daytime Population: Workers 1,483
Daytime Population: Residents 1,731
Total Daytime Population (TDP) 3,214
Ratio TDP/Total Population1 0.83
Population in Households 3,855
Population in Familes 2,626
Population in Group Qrtrs 0
Population Density2 4,607
Diversity Index3 10


Median Household Income $46,428
Average Household Income $60,539
Per Capita Income $30,604


Total Housing Units 2,223 (100%)
Owner Occupied HU 829 (37.3%)
Renter Occupied HU 1,145 (51.5%)
Vacant Housing Units 249 (11.2%)
Median Home Value $139,423
Average Home Value $152,108


Total Households 1,974
Average Household Size 1.95
Family Households 982
Average Family Size 3
  1. If the ratio of the TDP to Total Population is greater than 1, the location gains population during the day when commuting workers are present. If the ratio is less than 1, the location is more of a bedroom community where people commute to another place for work.
  2. Population Density = Total Population per square mile.
  3. 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 race 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.


2010-2017 2017-2022
Population -0.42% -0.37%
Households -0.34% -0.3%
Families -0.13% -0.41%
Median Household Income   1.5%
Per Capita Income   2.57%

Irwin, PA - Peer Comparisons by Rank and Percentile

The table below compares Irwin to the other 1,762 incorporated cities, towns and CDPs in Pennsylvania by rank and percentile using July 1, 2017 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 # 362 80th
Population Density # 176 90th
Diversity Index # 998 43rd
Median Household Income # 1136 36th
Per Capita Income # 478 73rd

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

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