ZIP code
15642
Irwin, PA
15642 covers Irwin in Westmoreland County, with 46,727 people in the ACS 2023 estimate.
Figures are for the Census ZIP Code Tabulation Area (ZCTA), which is not the same as a USPS ZIP code. A PO Box or unique ZIP may have no ZCTA and no demographics. Methodology
U.S. Census Bureau, ACS 2019–2023 5-year (vintage 2023). Geography: ZCTA 15642. Methodology
ZIP code map of 15642

About ZIP code 15642
Acceptable cities: N Huntingdon, No Huntingdon, North Huntingdon, North Irwin
More enterprise fields
Commercial ZIP directory · not ACS
Commercial ZIP directory population_count for ZCTA 15642. Not ACS. Methodology
People in 15642
Race
- White43,681
- Black or African American436
- American Indian or Alaska Native34
- Asian481
- Native Hawaiian and Pacific Islander3
- Other race134
- Two or more races1,692
Hispanic or Latino (any race): 594
Age
- Under 104,669
- 10 to 195,453
- 20 to 294,349
- 30 to 395,151
- 40 to 495,890
- 50 to 597,035
- 60 to 697,175
- 70 to 794,371
- 80 and older2,368
Income and housing in 15642
Education
- High school graduate97.7%
- Bachelor's degree41.1%
- Graduate degree14.5%
Places covering 15642
Cities and places — Population overlap
Share of this ZIP/ZCTA’s population located within each place, based on ZIP Code Database place-overlap data. This is a population measure, not land-area overlap or the Census-place population.
- Irwin8.4%
- Manor4.1%
- North Irwin1.8%
- White Oak0.3%
ZIP Code Database place-overlap table, field percent_of_zip_population_in_place, keyed by place_geoid. Not ACS 2019–2023. Overlap vintage is the shipped overlap table and is separate from ACS. Methodology
Counties — Population overlap
Share of this ZIP/ZCTA’s population located within each county, based on ZIP Code Database county-overlap data. This is a population measure, not land-area overlap or the Census county population.
- Westmoreland County99.7%
- Allegheny County0.3%
ZIP Code Database county-overlap table, field percent_of_zip_population_in_county, keyed by county_geoid. Not ACS 2019–2023. Overlap vintage is the shipped overlap table and is separate from ACS. Methodology
85.4% of this ZIP is outside city limits (a real overlap row, not missing data).
Population history for 15642
Hover the chart or read the table below (Year | ACS | IRS).
| Year | ACS population | IRS population |
|---|---|---|
| 2005 | 45,043 | |
| 2006 | 43,604 | |
| 2007 | 45,644 | |
| 2008 | 43,902 | |
| 2009 | 43,938 | |
| 2010 | 43,721 | |
| 2011 | 45,590 | 44,035 |
| 2012 | 45,361 | 43,880 |
| 2013 | 45,544 | 43,860 |
| 2014 | 45,301 | 43,780 |
| 2015 | 45,132 | 43,820 |
| 2016 | 44,960 | 44,140 |
| 2017 | 43,785 | 44,150 |
| 2018 | 44,060 | 44,170 |
| 2019 | 44,277 | 44,130 |
| 2020 | 44,333 | 44,240 |
| 2021 | 46,257 | 43,840 |
| 2022 | 46,855 | 44,000 |
| 2023 | 46,727 |
ACS: U.S. Census Bureau American Community Survey 5-year estimates. IRS: Statistics of Income ZIP Code data.
ZIP codes near 15642
12 nearest ZIP centroids (any distance)
- 15647Larimer1.6 miPop 33 · Income —
- 15678Rillton2.4 miPop 332 · Income $47,212
- 15692Westmoreland City2.5 miPop 769 · Income $66,047
- 15691Wendel2.6 miPop 329 · Income $162,945
- 15615Ardara2.9 miPop 164 · Income $85,542
- 15665Manor3.5 miPop 1,171 · Income $97,589
- 15047Greenock3.8 miPop 108 · Income $42,708
- 15611Adamsburg3.8 miPop 214 · Income $44,083
- 15131Mckeesport4.0 miPop 8,451 · Income $68,496
- 15637Herminie4.1 miPop 1,889 · Income $69,722
- 15625Darragh4.1 miPop 80 · Income $78,036
- 15028Coulters4.3 miPop 202 · Income $66,250
ZIP centroids within 2 miles
| ZIP | City | State | Distance (miles) | ACS population | Median income |
|---|---|---|---|---|---|
| 15647 | Larimer | PA | 1.6 mi | 33 | — |
ZIPs within 2 miles of this place
Default is 2 miles. Distances are between ZIP centroids. Widen the radius if nothing is in range.
ZIP code 15642 FAQ
- What city is ZIP code 15642 in?
- 15642 is in Irwin, PA.
- What county is 15642 in?
- 15642 is in Westmoreland County.
- What is the median household income in 15642?
- The median household income in 15642 is $92,975.
- Which ZIP codes are near 15642?
- Use the radius tool on this page to list ZIP codes within a chosen distance of 15642.