ZIP Code 15642 has segments in 2 Counties (Allegheny, Westmoreland).
Businesses Addresses: 1,107
PO Box Addresses: 105
Residential Addresses: 19,788
Multi-Family Addresses: 783
Single Family Addresses: 19,005
The ZIP Code maps and database are updated 4 times per year. Database updated: March 1, 2026, Maps updated: May 1, 2024.
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Irwin, PA 15642 Data & Demographics
Source: 2020-2024 American Community Survey 5-Year Estimates
POPULATION
Total Population
46,325 (100%)
Population Density
1,006 per sq mi
Diversity Index1
13
INCOME
Median Household Income
$97,706
Per Capita Income
$49,889
Median Home Value
$243,800
HOUSING
Total HU (Housing Units)
20,192 (100%)
Owner Occupied HU
16,407 (81.3%)
Renter Occupied HU
2,844 (14.1%)
Vacant Housing Units
941 (4.7%)
HOUSEHOLDS
Total Households
19,251
Average Household Size
2.39
Family Households
13,347 (69.3%)
NOTES
The Diversity Index estimates the likelihood that two persons chosen at random from the same area belong to different race or ethnic groups, based on five groups: Hispanic/Latino, Non-Hispanic White, Non-Hispanic Black, Non-Hispanic Asian, and Non-Hispanic Other/Multiracial. A value of 0 indicates the population belongs entirely to one group. Higher values indicate a more evenly mixed population. Calculated from U.S. Census Bureau ACS 5-year estimates (table B03002).
Irwin, PA 15642 - Peer Comparisons by Rank and Percentile
The table below compares 15642 to the other 33,772 ZIP Codes in the United States by rank and percentile using 2020-2024 American Community Survey 5-Year Estimates 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.
