Irwin ZIP Code List — Westmoreland County, PA

There is one unique ZIP code in Irwin, Pennsylvania and it is 15642. Area code: 724.

ZIP codes

46.04

sq mi land

0.12

sq mi water

724

area code

Irwin, PA ZIP code map

About Irwin, PA

Irwin is a charming borough located in Westmoreland County, Pennsylvania. Known for its picturesque neighborhoods and community spirit, Irwin offers a slice of small-town life within close proximity to larger urban centers. The borough provides a unique blend of historical heritage and modern amenities, making it an appealing place to live and visit.

Location & geography

Irwin is situated approximately 25 miles southeast of Pittsburgh, providing residents with easy access to the vibrant city life. The borough, part of Westmoreland County, covers a land area of 46.04 square miles, with a small water area of 0.12 square miles. Its terrain is predominantly flat, offering a mix of suburban charm and natural landscapes that appeal to outdoor enthusiasts.

Community & economy

The character of Irwin is defined by its friendly residents and active community events, fostering a strong sense of belonging. The local economy is supported by various industries, including retail, manufacturing, and healthcare, which provide employment opportunities for inhabitants. Daily life in Irwin is complemented by recreational activities, local parks, and community gatherings, enhancing the overall quality of life.

Transportation

Irwin is served by several major highways, including U.S. Route 30 and Pennsylvania Route 993, facilitating easy travel to nearby cities and attractions. The nearest named airport is the Arnold Palmer Regional Airport, located approximately 10 miles away, which offers regional flights. Public transportation options are also available, ensuring residents can easily navigate the area.

History

Irwin was founded in the late 19th century and has a rich history associated with the growth of the coal industry in Pennsylvania. Over the years, the borough has developed a strong sense of community, marked by various local businesses and industries that have shaped its growth. Notable events in its history include celebrations of its centennial and ongoing community development initiatives.

Did you know?

One surprising fact about Irwin is that it has a historical marker commemorating its significance during the Pennsylvania Railroad's expansion. Additionally, the borough is home to a variety of local shops and restaurants that showcase the region's cultural diversity.

ZIP codes for Irwin, PA (1)

ZIP code	City	County	Map
15642	Irwin	Westmoreland	View map

Demographics & statistics

46,855

Population

45.5

Median age

$85,210

Median household income

$44,209

Per capita income

$222,600

Median home value

$894

Median monthly rent

84.4%

Home ownership

6.4%

Poverty rate

4.6%

Unemployment

17,185

Housing units

39.8%

Bachelor's or higher

Age distribution

Male Female

1,077

Under 5

1,079

1,392

5–9

1,394

1,578

10–14

1,580

1,280

15–19

1,282

1,043

20–24

1,044

2,165

25–34

2,168

3,019

35–44

3,023

3,104

45–54

3,108

1,935

55–59

1,936

1,967

60–64

1,968

2,746

65–74

2,749

1,346

75–84

1,347

762

85+

763

← Male

Female →

Age summary

Group	Count	%
Under 18	9,877	21.1%
18 and over	36,978	78.9%
65 and over	9,713	20.7%
Median age	45.5 years

Race & ethnicity

White 93.3%

Two or more races 2.4%

Hispanic or Latino 1.3%

Asian 1.3%

Black or African American 1.2%

Other race 0.5%

Group	Count	%
White	44,301	93.3%
Two or more races	1,128	2.4%
Hispanic or Latino	622	1.3%
Asian	611	1.3%
Black or African American	556	1.2%
Other race	234	0.5%

Household income

Under $10k 3.4%

$10k–$15k 2.3%

$15k–$25k 5.8%

$25k–$35k 6.1%

$35k–$50k 10.8%

$50k–$75k 13.9%

$75k–$100k 14.8%

$100k–$150k 19.5%

$150k–$200k 11.6%

$200k+ 11.9%

Range	% of households
Under $10k	3.4%
$10k–$15k	2.3%
$15k–$25k	5.8%
$25k–$35k	6.1%
$35k–$50k	10.8%
$50k–$75k	13.9%
$75k–$100k	14.8%
$100k–$150k	19.5%
$150k–$200k	11.6%
$200k+	11.9%
Median income	$85,210

Housing

Home values

Under $50k 2.5%

$50k–$100k 6.3%

$100k–$150k 11.0%

$150k–$200k 21.5%

$200k–$300k 28.3%

$300k–$500k 22.9%

$500k–$1M 7.2%

$1M+ 0.3%

Housing overview

Metric	Value
Median home value	$222,600
Median rent / month	$894
Owner occupied	84.4%
Renter occupied	15.6%
Vacant	4.6%
Single-family detached	85.7%
Large apartment buildings	3.0%
Mobile homes	1.6%
Median rooms	6.7
Avg household size (owned)	2.51

Year built

Era	%
2020 or later	0.3%
2010–2019	5.5%
2000–2009	8.3%
1990–1999	10.9%
1980–1989	6.8%
1970–1979	13.4%
1960–1969	19.0%
1950–1959	18.8%
1940–1949	5.2%
1939 or earlier	11.9%

Bedrooms

Size	% of units
No bedroom (studio)	0.7%
1 bedroom	4.2%
2 bedrooms	16.8%
3 bedrooms	51.5%
4 bedrooms	23.1%
5+ bedrooms	3.7%

Vehicles per household

Vehicles	% of households
No vehicle	4.4%
1 vehicle	30.5%
2 vehicles	43.0%
3 or more	22.1%

Heating fuel

Fuel type	%
Utility gas	77.5%
Electricity	12.2%
Propane / LP gas	0.5%
Fuel oil	8.3%
Wood	0.7%
No fuel used	0.3%

Households & families

Household type	Count	%
Married-couple family	10,995	57.1%
Cohabiting couple	847	4.4%
Male householder, no spouse	2,879	14.9%
Female householder, no spouse	4,543	23.6%
Households with children under 18	5,496	28.5%
Households with seniors (65+)	6,836	35.5%
Average household size	2.42

Marital status

Status	Male	Female
Never married	27.0%	20.1%
Married	61.2%	56.2%
Separated	1.0%	1.1%
Widowed	3.3%	11.7%
Divorced	7.5%	10.8%

Education

Less than 9th grade 0.7%

Some HS, no diploma 1.7%

HS graduate 30.4%

Some college, no degree 14.9%

Associate's degree 12.4%

Bachelor's degree 26.4%

Graduate / professional 13.5%

Metric	%
HS diploma or higher	97.5%
Bachelor's or higher	39.8%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	645	6.4%
Kindergarten	468	4.7%
Elementary school	4,984	49.5%
High school	2,248	22.3%
College / grad school	1,717	17.1%

Employment

Industry of employment

Education & healthcare 25.6%

Manufacturing 13.4%

Retail trade 13.3%

Professional & management 11.8%

Finance & real estate 7.1%

Transportation & utilities 6.1%

Construction 5.7%

Arts, food & hospitality 4.8%

Other services 4.3%

Wholesale trade 2.9%

Public administration 2.6%

Information 1.8%

Agriculture & mining 0.5%

Occupation

Category	%
Management, business & arts	46.4%
Service	11.8%
Sales & office	21.6%
Natural resources & construction	7.7%
Production & transportation	12.5%

Employment type

Type	%
Private sector	85.2%
Government	10.2%
Self-employed	4.6%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	77.8%
Carpool	6.7%
Public transit	1.2%
Walk	0.5%
Other means	0.6%
Avg commute (minutes)	30.0

Poverty

All people 6.4%

Under 18 years 10.5%

18 and over 5.3%

Married-couple families 1.5%

Female-led households 22.3%

Income support

Source	% of households
Social Security	36.8%
Retirement income	30.1%
Supplemental Security	3.6%
Cash public assistance	2.4%
Food stamps / SNAP	7.8%

Health indicators

Condition	%
High blood pressure	32.1%
High cholesterol	34.8%
Heart disease	6.5%
Stroke	2.7%
Asthma	9.5%
Arthritis	30.2%
Kidney disease	2.7%
Pulmonary disease	6.5%
Cancer	7.7%

Behavior / access	%
Binge drinking	19.3%
No physical activity	20.4%
Less than 7 hrs sleep	31.4%
Fair or poor health	11.5%
Poor mental health	13.9%
Poor physical health	9.4%
No health insurance	7.9%
Visited doctor (checkup)	78.9%
Visited dentist	68.5%
Cholesterol screening	91.8%
Teeth loss	10.6%

Veterans & disability

Veterans	Count	%
Civilian veterans	2,937	7.9%

Disability	%
Any disability	13.1%
Under 18	3.1%
18–64 years	11.1%
65 and over	29.1%

Health insurance coverage

Type	%
Private insurance	81.1%
Public insurance	32.1%
Uninsured under 19	0.8%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	44,699	95.4%
Spanish	269	0.6%
Other Indo-European	42	0.1%
Asian & Pacific Islander	139	0.3%
Other languages	88	0.2%

Place of birth & citizenship

Origin	Count	%
Native born (US)	46,029	98.2%
Born in same state	45,784	97.7%
Born in different state	41,001	87.5%
Foreign born	245	0.5%
Naturalized citizen	826	1.8%
Not a US citizen	618	74.8%

Ancestry

Ancestry	Count	%
Italian	8,433	18%
French	4,791	10.2%
Arab	1,981	4.2%
Irish	917	2%
English	208	0.4%

Ancestry	Count	%
Norwegian	102	0.2%
German	74	0.2%
Dutch	71	0.2%
Polish	63	0.1%

Technology access

Metric	% of households
Computer access	41.1%
Internet access	92.5%

Source: U.S. Census Bureau, American Community Survey 2025 estimates.

Frequently asked questions

What is the ZIP code for Irwin, PA?

Irwin, PA has one ZIP code: 15642.

What is the main ZIP code for Irwin, PA?

The primary ZIP code for Irwin, PA is 15642. The city uses area code 724 for phone service.

What county is Irwin, PA in?

Irwin is located in Westmoreland County, Pennsylvania.

How many ZIP codes are in Irwin, PA?

Irwin, PA has 1 ZIP code.

What is the ZIP code for downtown Irwin, Pennsylvania?

Downtown Irwin, Pennsylvania is located in ZIP code 15642, which covers the central business district and main commercial areas of this Westmoreland County municipality.

What ZIP code should I use for mailing addresses to businesses along Pennsylvania Route 30 in Irwin?

Businesses along the major commercial corridor of Pennsylvania Route 30 in Irwin use ZIP code 15642 for all mailing addresses within the city.