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ZIP Code Database - Facts & Stats

Data Last Updated: November 1, 2022

ZIP Codes for City of Irwin, PA

Irwin, PA Covers 1 ZIP Code

ZIP CodeTypeCountyPopulation
ZIP Code 15642StandardWestmoreland45,286

Timezone(s):Eastern (GMT -05:00)
Population:3,973 (More Details)
Male Population:1,848
Female Population:2,125
Median Age:40
ZIP Codes:1
Area Codes:1
Total Area:1,036 square miles (county)
Land Area:1,028 square miles (county)
Water Area:9 square miles (county)

Irwin, PA Demographic Information *

Total population3,973
Male population1,848
Female population2,125
Median age (years)40.2
White Population3,833
Black Population47
Indian Population1
Asian Population35
Hawaiian Population2
Hispanic Population38
Median age (Male)37.5
Median age (Female)44
Total households2,024
Family households (families)991
Average household size1.96
Average family size2.72
Total housing units2,222
* Demographic data is based on 2010 Census. Products


  1. U.S. Postal Service [Last Updated: 11/1/2022],
  2. Internal Data Creation [Last Updated: 11/1/2022],
  3. U.S. Geological Survey [Updated as needed],
  4. U.S. Census [Updated Yearly],
  5. U.S. Census 2010 [Decennial] [Last Updated: 1/1/2010],