18351 ZIP Code — Portland, PA

Northampton County, Pennsylvania

ZIP code 18351 is located in Portland, Pennsylvania, within Northampton County. It covers approximately 0.33 square miles and serves a population of 606 residents. This is a standard ZIP code in the Eastern (ET) timezone, served by area code 570/610.

About ZIP code 18351

The housing stock consists of predominantly single-family detached homes. Most homes were built in the pre-1940, giving the area an established character. Median home value is $211,700. Renters make up the majority at 61%, typical of denser urban areas.

Median household income is $61,250. Poverty affects 21% of residents, above the national average.

The dominant occupation class is management, business, and professional, with education and healthcare as the leading industry. The average commute of 25 minutes is near the national average.

College attainment at 13% is below the national average, consistent with a trades and production-oriented local economy.

Health indicators show elevated rates of smoking (20%) compared to national benchmarks.

Overall, ZIP code 18351 reflects a community defined by a trades-oriented workforce and economic challenges above the national average.

606
population
0.33
sq mi land
Standard
ZIP type
Eastern (ET)
timezone
18351 ZIP code map
Cities in ZIP code 18351

Below are the cities the US Postal Service accepts for ZIP code 18351. Using any city not on this list may result in mail delivery delays.

City Status
Portland Acceptable
Demographics updated 06/2026
Population
Total population 606
Population density 1,836 / sq mi
State FIPS 42
County FIPS 095
Geography
Land area 0.33 sq mi
Water area 0.05 sq mi
Latitude 40.9216
Longitude -75.0974
Timezone Eastern (ET)
Area code 570/610
Total population by age
Gender
Race & ethnicity
Economics updated 06/2026
Household income
Income range This ZIP County avg State avg
Under $50k 46.8% 34.3% 39.8%
$50k – $100k 43.8% 31.7% 30.8%
$100k – $200k 9.5% 26.5% 22.4%
Over $200k 0.0% 7.5% 7.1%

Demographics & statistics

606
Population
1,836
People per sq mi
34.6
Median age
$61,250
Median household income
$22,894
Per capita income
$211,700
Median home value
$1,369
Median monthly rent
39.1%
Home ownership
21.3%
Poverty rate
22.1%
Unemployment
133
Housing units
12.8%
Bachelor's or higher

Age distribution

Male Female
36
Under 5
33
14
5–9
13
33
10–14
29
19
15–19
17
20
20–24
18
43
25–34
38
38
35–44
34
53
45–54
47
20
55–59
17
24
60–64
21
13
65–74
11
6
75–84
6
2
85+
1
← Male
Female →

Age summary

GroupCount%
Under 1817929.5%
18 and over42770.5%
65 and over396.4%
Median age34.6 years

Race & ethnicity

White 94%
Two or more races 3.1%
Hispanic or Latino 1.3%
Other race 1.3%
Black or African American 0.3%
GroupCount%
White57794%
Two or more races193.1%
Hispanic or Latino81.3%
Other race81.3%
Black or African American20.3%

Household income

Income range This ZIP County avg State avg
Under $50k 46.8% 34.3% 39.8%
$50k – $100k 43.8% 31.7% 30.8%
$100k – $200k 9.5% 26.5% 22.4%
Over $200k 0.0% 7.5% 7.1%
Under $10k 1.0%
$10k–$15k 1.5%
$15k–$25k 16.8%
$25k–$35k 11.9%
$35k–$50k 9.9%
$50k–$75k 13.9%
$75k–$100k 23.3%
$100k–$150k 18.3%
$150k–$200k 2.5%
$200k+ 1.0%
Range% of households
Under $10k1.0%
$10k–$15k1.5%
$15k–$25k16.8%
$25k–$35k11.9%
$35k–$50k9.9%
$50k–$75k13.9%
$75k–$100k23.3%
$100k–$150k18.3%
$150k–$200k2.5%
$200k+1.0%
Median income$61,250

Housing

Home values

Under $50k 3.8%
$50k–$100k 7.6%
$100k–$150k 8.9%
$150k–$200k 25.3%
$200k–$300k 38.0%
$300k–$500k 16.5%

Housing overview

MetricValue
Median home value$211,700
Median rent / month$1,369
Owner occupied39.1%
Renter occupied60.9%
Vacant21.1%
Single-family detached71.5%
Large apartment buildings0.0%
Mobile homes0.0%
Median rooms5.7
Avg household size (owned)2.18

Year built

Era%
2020 or later0.0%
2010–20195.5%
2000–20090.0%
1990–19996.6%
1980–19892.0%
1970–19793.5%
1960–19691.2%
1950–19594.3%
1940–19493.1%
1939 or earlier73.8%

Bedrooms

Size% of units
No bedroom (studio)2.3%
1 bedroom8.6%
2 bedrooms24.2%
3 bedrooms43.0%
4 bedrooms19.5%
5+ bedrooms2.3%

Vehicles per household

Vehicles% of households
No vehicle1.5%
1 vehicle37.1%
2 vehicles53.5%
3 or more7.9%

Heating fuel

Fuel type%
Utility gas6.4%
Electricity14.9%
Propane / LP gas2.5%
Fuel oil63.9%
Wood6.9%

Households & families

Household typeCount%
Married-couple family10853.5%
Cohabiting couple146.9%
Male householder, no spouse5326.2%
Female householder, no spouse2713.4%
Households with children under 188843.6%
Households with seniors (65+)3919.3%
Average household size3.00

Marital status

StatusMaleFemale
Never married36.2%41.5%
Married57.6%55.1%
Separated2.9%0.0%
Widowed2.5%2.0%
Divorced0.8%1.5%

Education

Less than 9th grade 0.0%
Some HS, no diploma 2.1%
HS graduate 59.1%
Some college, no degree 10.2%
Associate's degree 15.8%
Bachelor's degree 7.0%
Graduate / professional 5.9%
Metric%
HS diploma or higher97.9%
Bachelor's or higher12.8%

School enrollment (ages 3–17)

TypeCount%
Nursery / preschool2013.1%
Kindergarten42.6%
Elementary school8555.6%
High school2818.3%
College / grad school1610.5%

Employment

Industry of employment

Education & healthcare 22.1%
Retail trade 20.4%
Arts, food & hospitality 14.2%
Construction 13.3%
Manufacturing 8.8%
Transportation & utilities 5.8%
Professional & management 4.4%
Other services 4.4%
Finance & real estate 4.0%
Wholesale trade 2.7%

Occupation

Category%
Management, business & arts32.3%
Service19.0%
Sales & office12.4%
Natural resources & construction11.9%
Production & transportation24.3%

Employment type

Type%
Private sector90.7%
Government3.1%
Self-employed6.2%
Unpaid family workers0.0%

Commute

Method%
Drive alone79.2%
Carpool18.6%
Public transit0.9%
Walk1.3%
Work from home0.0%
Other means0.0%
Avg commute (minutes)25.3

Poverty

All people 21.3%
Under 18 years 34.1%
18 and over 15.9%
Married-couple families 17.6%
Female-led households 33.3%

Income support

Source% of households
Social Security26.2%
Retirement income11.9%
Supplemental Security5.0%
Cash public assistance4.0%
Food stamps / SNAP14.4%

Health indicators

Condition%
Obesity32.0%
High blood pressure32.6%
High cholesterol32.2%
Diabetes10.3%
Heart disease6.5%
Stroke2.8%
Asthma10.0%
Arthritis29.5%
Kidney disease2.7%
Pulmonary disease7.2%
Cancer6.8%
Behavior / access%
Smoking20.1%
Binge drinking19.3%
No physical activity21.9%
Less than 7 hrs sleep36.5%
Depression22.9%
Fair or poor health13.1%
Poor mental health15.4%
Poor physical health10.4%
No health insurance9.9%
Visited doctor (checkup)77.0%
Visited dentist66.7%
Cholesterol screening90.3%
Teeth loss13.2%

Veterans & disability

VeteransCount%
Civilian veterans235.4%
Disability%
Any disability7.8%
Under 180.0%
18–64 years11.9%
65 and over2.6%

Health insurance coverage

Type%
Private insurance73.9%
Public insurance25.4%
No insurance7.9%
Uninsured under 197.7%

Language & origin

Language spoken at home (age 5+)

LanguageCount%
English only53788.6%
Spanish71.3%
Other Indo-European00.0%
Asian & Pacific Islander71.3%
Other languages00.0%

Place of birth & citizenship

OriginCount%
Native born (US)58496.4%
Born in same state55090.8%
Born in different state20734.2%
Foreign born345.6%
Naturalized citizen223.6%
Not a US citizen1568.2%

Ancestry

AncestryCount%
Arab15225.1%
French7011.6%
English71.2%
AncestryCount%
Italian71.2%
Irish61%

Technology access

Metric% of households
Computer access33.3%
Internet access96.5%

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

Frequently asked questions about ZIP code 18351

What city is ZIP code 18351 in?

ZIP code 18351 is primarily assigned to Portland, Pennsylvania.

What county is ZIP code 18351 in?

ZIP code 18351 falls within Northampton County, Pennsylvania.

Is ZIP code 18351 mostly rentals?

61% of occupied units in ZIP code 18351 are renter-occupied.

What is the poverty rate in ZIP code 18351?

21% of residents in ZIP code 18351 live below the poverty line, above the national average.

How educated is the population of ZIP code 18351?

13% of residents hold a bachelor's degree or higher — below the national average of ~33%, consistent with a trades-oriented local economy.

What is the population of ZIP code 18351?

ZIP code 18351 has an estimated population of 606 residents, with a density of 1,825 people per square mile.

What timezone is ZIP code 18351 in?

ZIP code 18351 observes the EST timezone.

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