18031 ZIP Code — Breinigsville, PA

Lehigh County, Pennsylvania

ZIP code 18031 is located in Breinigsville, Pennsylvania, within Lehigh County. It covers approximately 13.93 square miles and serves a population of 12,337 residents. This is a standard ZIP code in the Eastern (ET) timezone, served by area code 610.

About ZIP code 18031

The housing stock consists of a mix of housing types. Most homes were built in the 2000s, giving the area an established character. Median home value is $343,800. Owner-occupancy sits near the national average at 75%.

The gap between median ($94,896) and mean household income suggests income inequality — a small number of higher earners pull the average up. The poverty rate of 7% is below the national average.

The dominant occupation class is management, business, and professional, with education and healthcare as the leading industry. The average commute of 26 minutes is near the national average.

Educational attainment is high — 47% of residents hold a bachelor's degree or higher, well above the national average of 33%.

12,337

population

13.93

sq mi land

Standard

ZIP type

Eastern (ET)

timezone

18031 ZIP code map

Cities in ZIP code 18031

Below are the cities the US Postal Service accepts for ZIP code 18031. Using any city not on this list may result in mail delivery delays.

City	Status
Breinigsville	Preferred

Nearby ZIP codes

18087 Trexlertown (3.5 mi) 18051 Fogelsville (3.5 mi) 19562 Topton (3.7 mi) 19539 Mertztown (4.3 mi) 18106 Allentown (4.7 mi) 18011 Alburtis (4.8 mi) 18062 Macungie (5.2 mi) 18195 Allentown (5.5 mi) 18069 Orefield (5.6 mi) 19530 Kutztown (6.1 mi) 18104 Allentown (7.9 mi) 18066 New Tripoli (8.6 mi)

Demographics updated 05/2026

Population
Total population	12,337
Population density	886 / sq mi
State FIPS	42
County FIPS	077

Geography
Land area	13.93 sq mi
Water area	0.03 sq mi
Latitude	40.5488
Longitude	-75.6659
Timezone	Eastern (ET)
Area code	610

Total population by age

Gender

Race & ethnicity

Economics updated 05/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	22.2%	37.9%	39.8%
$50k – $100k	35.4%	30.5%	30.8%
$100k – $200k	30.1%	24.2%	22.4%
Over $200k	12.2%	7.4%	7.1%

Demographics & statistics

12,337

Population

886

People per sq mi

39.3

Median age

$94,896

Median household income

$53,812

Per capita income

$343,800

Median home value

$1,724

Median monthly rent

74.5%

Home ownership

6.5%

Poverty rate

3.6%

Unemployment

3,514

Housing units

47.3%

Bachelor's or higher

Age distribution

Male Female

435

Under 5

520

334

5–9

399

540

10–14

645

316

15–19

378

138

20–24

165

706

25–34

844

887

35–44

1,062

661

45–54

791

493

55–59

590

404

60–64

484

448

65–74

535

158

75–84

190

85+

117

← Male

Female →

Age summary

Group	Count	%
Under 18	3,497	28.3%
18 and over	8,840	71.7%
65 and over	1,545	12.5%
Median age	39.3 years

Race & ethnicity

White 51.6%

Hispanic or Latino 14.3%

Two or more races 12.6%

Asian 10.7%

Black or African American 8.1%

Other race 2.7%

Group	Count	%
White	7,426	51.6%
Hispanic or Latino	2,051	14.3%
Two or more races	1,818	12.6%
Asian	1,538	10.7%
Black or African American	1,168	8.1%
Other race	387	2.7%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	22.2%	37.9%	39.8%
$50k – $100k	35.4%	30.5%	30.8%
$100k – $200k	30.1%	24.2%	22.4%
Over $200k	12.2%	7.4%	7.1%

Under $10k 0.1%

$10k–$15k 0.6%

$15k–$25k 1.1%

$25k–$35k 2.6%

$35k–$50k 9.4%

$50k–$75k 16.1%

$75k–$100k 22.4%

$100k–$150k 16.2%

$150k–$200k 10.9%

$200k+ 20.5%

Range	% of households
Under $10k	0.1%
$10k–$15k	0.6%
$15k–$25k	1.1%
$25k–$35k	2.6%
$35k–$50k	9.4%
$50k–$75k	16.1%
$75k–$100k	22.4%
$100k–$150k	16.2%
$150k–$200k	10.9%
$200k+	20.5%
Median income	$94,896

Housing

Home values

Under $50k 13.5%

$50k–$100k 4.9%

$100k–$150k 4.1%

$150k–$200k 8.0%

$200k–$300k 6.8%

$300k–$500k 44.5%

$500k–$1M 18.2%

$1M+ 0.1%

Housing overview

Metric	Value
Median home value	$343,800
Median rent / month	$1,724
Owner occupied	74.5%
Renter occupied	25.5%
Vacant	8.1%
Single-family detached	45.3%
Large apartment buildings	3.3%
Mobile homes	11.2%
Median rooms	6.4
Avg household size (owned)	2.95

Year built

Era	%
2020 or later	0.6%
2010–2019	26.7%
2000–2009	30.6%
1990–1999	9.6%
1980–1989	10.2%
1970–1979	6.5%
1960–1969	5.1%
1950–1959	3.3%
1940–1949	0.4%
1939 or earlier	6.9%

Bedrooms

Size	% of units
No bedroom (studio)	0.4%
1 bedroom	2.9%
2 bedrooms	25.5%
3 bedrooms	41.2%
4 bedrooms	24.3%
5+ bedrooms	5.7%

Vehicles per household

Vehicles	% of households
No vehicle	1.1%
1 vehicle	22.3%
2 vehicles	55.1%
3 or more	21.5%

Heating fuel

Fuel type	%
Utility gas	53.5%
Electricity	21.1%
Propane / LP gas	4.2%
Fuel oil	18.4%
Wood	2.8%

Households & families

Household type	Count	%
Married-couple family	2,690	63.8%
Cohabiting couple	319	7.6%
Male householder, no spouse	341	8.1%
Female householder, no spouse	865	20.5%
Households with children under 18	1,691	40.1%
Households with seniors (65+)	1,233	29.3%
Average household size	2.91

Marital status

Status	Male	Female
Never married	15.5%	31.1%
Married	73.8%	49.6%
Separated	0.2%	0.4%
Widowed	1.7%	9.0%
Divorced	9.0%	10.0%

Education

Less than 9th grade 0.2%

Some HS, no diploma 6.4%

HS graduate 27.1%

Some college, no degree 10.6%

Associate's degree 8.6%

Bachelor's degree 25.4%

Graduate / professional 21.9%

Metric	%
HS diploma or higher	93.5%
Bachelor's or higher	47.3%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	263	8.7%
Kindergarten	89	2.9%
Elementary school	1,703	56.3%
High school	758	25.0%
College / grad school	214	7.1%

Employment

Industry of employment

Education & healthcare 27.8%

Professional & management 13.4%

Manufacturing 11.6%

Transportation & utilities 10.6%

Retail trade 9.3%

Construction 6.2%

Wholesale trade 4.9%

Arts, food & hospitality 4.5%

Information 3.9%

Other services 3.4%

Finance & real estate 2.4%

Public administration 1.8%

Occupation

Category	%
Management, business & arts	53.6%
Service	6.2%
Sales & office	25.8%
Natural resources & construction	5.0%
Production & transportation	9.4%

Employment type

Type	%
Private sector	88.2%
Government	6.8%
Self-employed	5.0%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	76.4%
Carpool	3.3%
Public transit	0.0%
Walk	0.8%
Work from home	19.3%
Other means	0.2%
Avg commute (minutes)	26.2

Poverty

All people 6.5%

Under 18 years 10.2%

18 and over 5.1%

Married-couple families 0.3%

Female-led households 37.5%

Income support

Source	% of households
Social Security	27.0%
Retirement income	26.5%
Supplemental Security	4.2%
Cash public assistance	1.2%
Food stamps / SNAP	5.9%

Health indicators

Condition	%
Obesity	30.6%
High blood pressure	26.5%
High cholesterol	30.3%
Diabetes	7.7%
Heart disease	4.7%
Stroke	2.0%
Asthma	9.2%
Arthritis	20.9%
Kidney disease	2.1%
Pulmonary disease	4.6%
Cancer	5.9%

Behavior / access	%
Smoking	14.1%
Binge drinking	20.2%
No physical activity	17.9%
Less than 7 hrs sleep	35.9%
Depression	20.2%
Fair or poor health	9.2%
Poor mental health	13.7%
Poor physical health	7.6%
No health insurance	8.6%
Visited doctor (checkup)	77.0%
Visited dentist	73.7%
Cholesterol screening	90.7%
Teeth loss	8.7%

Veterans & disability

Veterans	Count	%
Civilian veterans	624	7.1%

Disability	%
Any disability	11.9%
Under 18	3.4%
18–64 years	11.0%
65 and over	36.2%

Health insurance coverage

Type	%
Private insurance	80.0%
Public insurance	24.2%
No insurance	7.6%
Uninsured under 19	2.1%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	11,382	92.3%
Spanish	1,372	12.1%
Other Indo-European	517	4.5%
Asian & Pacific Islander	614	5.4%
Other languages	137	1.2%

Place of birth & citizenship

Origin	Count	%
Native born (US)	9,867	80.0%
Born in same state	9,512	77.1%
Born in different state	6,828	55.3%
Foreign born	355	2.9%
Naturalized citizen	2,470	20.0%
Not a US citizen	1,281	51.9%

Ancestry

Ancestry	Count	%
Italian	1,755	14.2%
French	797	6.5%
Arab	478	3.9%
English	320	2.6%

Ancestry	Count	%
Polish	48	0.4%
Norwegian	6	0%
Irish	4	0%
Dutch	3	0%

Technology access

Metric	% of households
Computer access	34.2%
Internet access	97.8%

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

Frequently asked questions about ZIP code 18031

What city is ZIP code 18031 in?

ZIP code 18031 is primarily assigned to Breinigsville, Pennsylvania.

What county is ZIP code 18031 in?

ZIP code 18031 falls within Lehigh County, Pennsylvania.

How educated is the population of ZIP code 18031?

47% of residents hold a bachelor's degree or higher — well above the national average of ~33%, reflecting a highly educated population.

What is the typical home value in ZIP code 18031?

The median home value in ZIP code 18031 is $343,800.

What is the population of ZIP code 18031?

ZIP code 18031 has an estimated population of 12,337 residents, with a density of 886 people per square mile.

What is the median household income in ZIP code 18031?

The median household income in ZIP code 18031 is $94,896, above the national median of ~$75,000.

What timezone is ZIP code 18031 in?

ZIP code 18031 observes the EST timezone.