18101 ZIP Code — Allentown, PA

Lehigh County, Pennsylvania

ZIP code 18101 is located in Allentown, Pennsylvania, within Lehigh County. It covers approximately 0.31 square miles and serves a population of 5,673 residents. This is a standard ZIP code in the Eastern (ET) timezone, served by area code 484/610.

About ZIP code 18101

The housing stock consists of a significant share of large multi-unit buildings. Most homes were built in the pre-1940, giving the area an established character. Median home value is $158,800. Renters make up the majority at 90%, typical of denser urban areas.

The gap between median ($39,044) and mean household income suggests income inequality — a small number of higher earners pull the average up. Poverty affects 26% of residents, above the national average. SNAP benefit usage at 41% of households reflects economic stress in the area.

The dominant occupation class is management, business, and professional, with education and healthcare as the leading industry. The average commute of 23 minutes is near the national average.

College attainment at 16% is below the national average, consistent with a trades and production-oriented local economy.

Health indicators show elevated rates of obesity (47%), diabetes (17%), smoking (27%) compared to national benchmarks.

Notable community characteristics include Spanish spoken in 22% of households.

Overall, ZIP code 18101 reflects a community defined by a trades-oriented workforce, economic challenges above the national average, and elevated reliance on food assistance.

5,673

population

0.31

sq mi land

Standard

ZIP type

Eastern (ET)

timezone

18101 ZIP code map

Cities in ZIP code 18101

Below are the cities the US Postal Service accepts for ZIP code 18101. Using any city not on this list may result in mail delivery delays.

City	Status
Allentown	Preferred

Nearby ZIP codes

18102 Allentown (0.5 mi) 18025 Bethlehem (0.7 mi) 18103 Allentown (2.5 mi) 18003 Lehigh Valley (3.1 mi) 18109 Allentown (3.1 mi) 18032 Catasauqua (3.3 mi) 18052 Whitehall (3.8 mi) 18104 Allentown (4 mi) 18018 Bethlehem (4.2 mi) 18099 Emmaus (5 mi) 18098 Emmaus (5 mi) 18016 Bethlehem (5.3 mi)

Demographics updated 05/2026

Population
Total population	5,673
Population density	18,300 / sq mi
State FIPS	42
County FIPS	077

Geography
Land area	0.31 sq mi
Water area	0.00 sq mi
Latitude	40.6081
Longitude	-75.4689
Timezone	Eastern (ET)
Area code	484/610

Total population by age

Gender

Race & ethnicity

Economics updated 05/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	74.7%	37.9%	39.8%
$50k – $100k	14.0%	30.5%	30.8%
$100k – $200k	7.0%	24.2%	22.4%
Over $200k	4.3%	7.4%	7.1%

Demographics & statistics

5,673

Population

18,300

People per sq mi

30.3

Median age

$39,044

Median household income

$28,199

Per capita income

$158,800

Median home value

$1,173

Median monthly rent

10.0%

Home ownership

26.2%

Poverty rate

13.0%

Unemployment

500

Housing units

15.8%

Bachelor's or higher

Age distribution

Male Female

149

Under 5

118

133

5–9

105

191

10–14

152

138

15–19

110

427

20–24

340

901

25–34

717

320

35–44

254

445

45–54

354

160

55–59

127

60–64

160

65–74

128

75–84

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	1,044	18.4%
18 and over	4,629	81.6%
65 and over	403	7.1%
Median age	30.3 years

Race & ethnicity

White 28.8%

Hispanic or Latino 25.7%

Black or African American 16.6%

Other race 14%

Two or more races 13.6%

Asian 1.3%

American Indian / Alaska Native 0.1%

Group	Count	%
White	2,199	28.8%
Hispanic or Latino	1,964	25.7%
Black or African American	1,268	16.6%
Other race	1,066	14%
Two or more races	1,036	13.6%
Asian	97	1.3%
American Indian / Alaska Native	7	0.1%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	74.7%	37.9%	39.8%
$50k – $100k	14.0%	30.5%	30.8%
$100k – $200k	7.0%	24.2%	22.4%
Over $200k	4.3%	7.4%	7.1%

Under $10k 4.6%

$10k–$15k 4.6%

$15k–$25k 20.2%

$25k–$35k 13.5%

$35k–$50k 17.4%

$50k–$75k 10.0%

$75k–$100k 9.8%

$100k–$150k 7.8%

$150k–$200k 6.3%

$200k+ 5.8%

Range	% of households
Under $10k	4.6%
$10k–$15k	4.6%
$15k–$25k	20.2%
$25k–$35k	13.5%
$35k–$50k	17.4%
$50k–$75k	10.0%
$75k–$100k	9.8%
$100k–$150k	7.8%
$150k–$200k	6.3%
$200k+	5.8%
Median income	$39,044

Housing

Home values

$50k–$100k 19.7%

$100k–$150k 22.4%

$150k–$200k 22.4%

$200k–$300k 28.3%

$500k–$1M 7.2%

Housing overview

Metric	Value
Median home value	$158,800
Median rent / month	$1,173
Owner occupied	10.0%
Renter occupied	90.0%
Vacant	11.1%
Single-family detached	4.2%
Large apartment buildings	32.4%
Mobile homes	0.0%
Median rooms	3.6
Avg household size (owned)	3.72

Year built

Era	%
2020 or later	1.7%
2010–2019	22.6%
2000–2009	2.8%
1990–1999	0.9%
1980–1989	5.0%
1970–1979	7.9%
1960–1969	0.4%
1950–1959	6.6%
1940–1949	2.4%
1939 or earlier	49.8%

Bedrooms

Size	% of units
No bedroom (studio)	19.8%
1 bedroom	33.5%
2 bedrooms	25.3%
3 bedrooms	13.0%
4 bedrooms	4.8%
5+ bedrooms	3.6%

Vehicles per household

Vehicles	% of households
No vehicle	21.0%
1 vehicle	49.7%
2 vehicles	23.2%
3 or more	6.1%

Heating fuel

Fuel type	%
Utility gas	42.0%
Electricity	54.5%
Propane / LP gas	0.7%
Fuel oil	1.0%
No fuel used	1.8%

Households & families

Household type	Count	%
Married-couple family	399	17.9%
Cohabiting couple	240	10.8%
Male householder, no spouse	631	28.4%
Female householder, no spouse	954	42.9%
Households with children under 18	636	28.6%
Households with seniors (65+)	315	14.2%
Average household size	2.11

Marital status

Status	Male	Female
Never married	71.1%	56.1%
Married	18.0%	20.1%
Separated	2.6%	9.3%
Widowed	0.2%	7.8%
Divorced	8.1%	6.8%

Education

Less than 9th grade 4.9%

Some HS, no diploma 14.3%

HS graduate 34.5%

Some college, no degree 27.0%

Associate's degree 3.5%

Bachelor's degree 7.7%

Graduate / professional 8.1%

Metric	%
HS diploma or higher	80.8%
Bachelor's or higher	15.8%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	25	2.7%
Kindergarten	69	7.6%
Elementary school	460	50.5%
High school	201	22.1%
College / grad school	155	17.0%

Employment

Industry of employment

Education & healthcare 23.6%

Professional & management 14.1%

Transportation & utilities 11.5%

Retail trade 10.3%

Arts, food & hospitality 8.1%

Manufacturing 7.2%

Finance & real estate 5.7%

Public administration 5.0%

Construction 4.6%

Other services 2.9%

Agriculture & mining 2.8%

Wholesale trade 2.2%

Information 2.1%

Occupation

Category	%
Management, business & arts	32.1%
Service	21.9%
Sales & office	18.1%
Natural resources & construction	4.6%
Production & transportation	23.2%

Employment type

Type	%
Private sector	89.7%
Government	6.5%
Self-employed	3.8%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	58.3%
Carpool	14.3%
Public transit	2.8%
Walk	12.8%
Work from home	11.6%
Other means	0.2%
Avg commute (minutes)	23.1

Poverty

All people 26.2%

Under 18 years 28.1%

18 and over 25.7%

Married-couple families 22.1%

Female-led households 29.6%

Income support

Source	% of households
Social Security	13.5%
Retirement income	5.8%
Supplemental Security	9.6%
Cash public assistance	8.5%
Food stamps / SNAP	40.8%

Health indicators

Condition	%
Obesity	46.8%
High blood pressure	36.2%
High cholesterol	29.4%
Diabetes	17.2%
Heart disease	7.6%
Stroke	4.3%
Asthma	12.2%
Arthritis	25.4%
Kidney disease	4.0%
Pulmonary disease	9.3%
Cancer	4.3%

Behavior / access	%
Smoking	27.2%
Binge drinking	15.8%
No physical activity	41.1%
Less than 7 hrs sleep	44.1%
Depression	22.8%
Fair or poor health	29.7%
Poor mental health	19.6%
Poor physical health	16.9%
No health insurance	27.4%
Visited doctor (checkup)	77.8%
Visited dentist	43.4%
Cholesterol screening	82.8%
Teeth loss	28.0%

Veterans & disability

Veterans	Count	%
Civilian veterans	151	3.3%

Disability	%
Any disability	15.3%
Under 18	3.9%
18–64 years	16.0%
65 and over	38.5%

Health insurance coverage

Type	%
Private insurance	36.1%
Public insurance	58.5%
No insurance	9.0%
Uninsured under 19	4.6%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	5,406	95.3%
Spanish	1,162	21.5%
Other Indo-European	1,108	20.5%
Asian & Pacific Islander	0	0.0%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	5,008	88.3%
Born in same state	3,941	69.5%
Born in different state	2,004	35.3%
Foreign born	1,067	18.8%
Naturalized citizen	665	11.7%
Not a US citizen	213	32.0%

Ancestry

Ancestry	Count	%
Italian	296	5.2%
Arab	292	5.1%
French	150	2.6%

Ancestry	Count	%
English	40	0.7%
Polish	26	0.5%
Irish	20	0.4%

Technology access

Metric	% of households
Computer access	39.2%
Internet access	96.4%

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

Frequently asked questions about ZIP code 18101

What city is ZIP code 18101 in?

ZIP code 18101 is primarily assigned to Allentown, Pennsylvania.

What county is ZIP code 18101 in?

ZIP code 18101 falls within Lehigh County, Pennsylvania.

Is ZIP code 18101 mostly rentals?

90% of occupied units in ZIP code 18101 are renter-occupied.

What is the poverty rate in ZIP code 18101?

26% of residents in ZIP code 18101 live below the poverty line, above the national average.

Is Spanish widely spoken in ZIP code 18101?

Approximately 22% of households in ZIP code 18101 speak Spanish as a primary language.

What are the health statistics for ZIP code 18101?

Health data for ZIP code 18101 shows elevated rates of obesity (47%) and diabetes (17%) and smoking (27%) compared to national benchmarks.

What timezone is ZIP code 18101 in?

ZIP code 18101 observes the EST timezone.