19731 ZIP Code — Port Penn, DE

New Castle County, Delaware

ZIP code 19731 is located in Port Penn, Delaware, within New Castle County. It covers approximately 2.53 square miles and serves a population of 328 residents. This is a standard ZIP code in the Eastern (ET) timezone, served by area code 302.

About ZIP code 19731

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 $429,800. Owner-occupancy is high at 87%, well above the national average.

The gap between median ($65,921) and mean household income suggests income inequality — a small number of higher earners pull the average up. 78% of households receive Social Security income, suggesting a notable retiree or disability population.

The dominant occupation class is service, with retail trade as the leading industry.

College attainment at 4% is below the national average, consistent with a trades and production-oriented local economy.

Overall, ZIP code 19731 reflects a community defined by a trades-oriented workforce, high homeownership, and a significant Social Security-dependent population.

328

population

2.53

sq mi land

Standard

ZIP type

Eastern (ET)

timezone

19731 ZIP code map

Cities in ZIP code 19731

Below are the cities the US Postal Service accepts for ZIP code 19731. Using any city not on this list may result in mail delivery delays.

City	Status
Port Penn	Acceptable

Demographics updated 05/2026

Population
Total population	328
Population density	130 / sq mi
State FIPS	10
County FIPS	003

Geography
Land area	2.53 sq mi
Water area	0.18 sq mi
Latitude	39.5152
Longitude	-75.5758
Timezone	Eastern (ET)
Area code	302

Total population by age

Gender

Race & ethnicity

Economics updated 05/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	61.5%	33.4%	36.1%
$50k – $100k	16.5%	30.4%	31.6%
$100k – $200k	22.0%	26.6%	24.7%
Over $200k	0.0%	9.5%	7.6%

Demographics & statistics

328

Population

130

People per sq mi

70.1

Median age

$65,921

Median household income

$54,294

Per capita income

$429,800

Median home value

Median monthly rent

86.8%

Home ownership

0.0%

Poverty rate

0.0%

Unemployment

132

Housing units

3.6%

Bachelor's or higher

Age distribution

Male Female

5–9

10–14

35–44

45–54

55–59

65–74

75–84

← Male

Female →

Age summary

Group	Count	%
Under 18	23	7.0%
18 and over	305	93.0%
65 and over	247	75.3%
Median age	70.1 years

Race & ethnicity

White 100%

Group	Count	%
White	328	100%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	61.5%	33.4%	36.1%
$50k – $100k	16.5%	30.4%	31.6%
$100k – $200k	22.0%	26.6%	24.7%
Over $200k	0.0%	9.5%	7.6%

$50k–$75k 73.7%

$100k–$150k 9.9%

$150k–$200k 9.2%

$200k+ 7.2%

Range	% of households
$50k–$75k	73.7%
$100k–$150k	9.9%
$150k–$200k	9.2%
$200k+	7.2%
Median income	$65,921

Housing

Home values

$150k–$200k 10.6%

$200k–$300k 26.5%

$300k–$500k 43.2%

$500k–$1M 8.3%

$1M+ 11.4%

Housing overview

Metric	Value
Median home value	$429,800
Median rent / month	$0
Owner occupied	86.8%
Renter occupied	13.2%
Vacant	0.0%
Single-family detached	77.0%
Large apartment buildings	0.0%
Mobile homes	0.0%
Median rooms	5.8
Avg household size (owned)	2.18

Year built

Era	%
2020 or later	0.0%
2010–2019	0.0%
2000–2009	0.0%
1990–1999	7.2%
1980–1989	9.9%
1970–1979	0.0%
1960–1969	0.0%
1950–1959	23.0%
1940–1949	9.2%
1939 or earlier	50.7%

Bedrooms

Size	% of units
No bedroom (studio)	0.0%
1 bedroom	0.0%
2 bedrooms	37.5%
3 bedrooms	53.3%
4 bedrooms	9.2%
5+ bedrooms	0.0%

Vehicles per household

Vehicles	% of households
No vehicle	0.0%
1 vehicle	23.0%
2 vehicles	50.7%
3 or more	26.3%

Heating fuel

Fuel type	%
Utility gas	23.0%
Electricity	17.1%
Fuel oil	59.9%

Households & families

Household type	Count	%
Married-couple family	117	77.0%
Cohabiting couple	0	0.0%
Male householder, no spouse	35	23.0%
Female householder, no spouse	0	0.0%
Households with children under 18	11	7.2%
Households with seniors (65+)	138	90.8%
Average household size	2.16

Marital status

Status	Male	Female
Never married	7.3%	0.0%
Married	73.2%	100.0%
Separated	19.6%	0.0%
Widowed	0.0%	0.0%
Divorced	0.0%	0.0%

Education

Less than 9th grade 6.6%

Some HS, no diploma 5.2%

HS graduate 31.8%

Some college, no degree 49.8%

Associate's degree 3.0%

Bachelor's degree 3.6%

Graduate / professional 0.0%

Metric	%
HS diploma or higher	88.2%
Bachelor's or higher	3.6%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	0	0.0%
Kindergarten	0	0.0%
Elementary school	23	100.0%
High school	0	0.0%
College / grad school	0	0.0%

Employment

Industry of employment

Retail trade 42.5%

Professional & management 29.2%

Construction 20.8%

Education & healthcare 7.5%

Occupation

Category	%
Management, business & arts	16.7%
Service	29.2%
Sales & office	25.8%
Natural resources & construction	11.7%
Production & transportation	16.7%

Employment type

Type	%
Private sector	100.0%
Government	0.0%
Self-employed	0.0%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	81.7%
Carpool	0.0%
Public transit	0.0%
Walk	0.0%
Work from home	18.3%
Other means	0.0%
Avg commute (minutes)	0.0

Poverty

All people 0.0%

Under 18 years 0.0%

18 and over 0.0%

Married-couple families 0.0%

Female-led households 0.0%

Income support

Source	% of households
Social Security	77.6%
Retirement income	54.6%
Supplemental Security	0.0%
Cash public assistance	0.0%
Food stamps / SNAP	0.0%

Health indicators

Condition	%
Obesity	30.0%
High blood pressure	30.5%
High cholesterol	32.5%
Diabetes	8.8%
Heart disease	5.5%
Stroke	2.4%
Asthma	10.0%
Arthritis	22.5%
Kidney disease	2.5%
Pulmonary disease	5.8%
Cancer	6.8%

Behavior / access	%
Smoking	13.8%
Binge drinking	18.6%
No physical activity	19.2%
Less than 7 hrs sleep	30.6%
Depression	19.1%
Fair or poor health	10.8%
Poor mental health	13.2%
Poor physical health	9.1%
No health insurance	10.0%
Visited doctor (checkup)	73.2%
Visited dentist	72.5%
Cholesterol screening	90.9%
Teeth loss	8.4%

Veterans & disability

Veterans	Count	%
Civilian veterans	28	9.2%

Disability	%
Any disability	21.6%
Under 18	0.0%
18–64 years	22.4%
65 and over	23.5%

Health insurance coverage

Type	%
Private insurance	53.0%
Public insurance	67.1%
No insurance	0.0%
Uninsured under 19	0.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	328	100.0%
Spanish	0	0.0%
Other Indo-European	0	0.0%
Asian & Pacific Islander	0	0.0%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	328	100.0%
Born in same state	328	100.0%
Born in different state	206	62.8%
Foreign born	0	0.0%
Naturalized citizen	0	0.0%
Not a US citizen	0	0.0%

Ancestry

Ancestry	Count	%
Italian	129	39.3%

Ancestry	Count	%
French	45	13.7%

Technology access

Metric	% of households
Computer access	46.3%
Internet access	62.5%

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

Frequently asked questions about ZIP code 19731

What city is ZIP code 19731 in?

ZIP code 19731 is primarily assigned to Port Penn, Delaware.

What county is ZIP code 19731 in?

ZIP code 19731 falls within New Castle County, Delaware.

Does ZIP code 19731 have an older population?

75% of residents in ZIP code 19731 are 65 or older, above the national average of ~17%.

Does ZIP code 19731 have a large retiree population?

78% of households in ZIP code 19731 receive Social Security income, suggesting a significant retiree or disability population.

How educated is the population of ZIP code 19731?

4% of residents hold a bachelor's degree or higher — below the national average of ~33%, consistent with a trades-oriented local economy.

Is ZIP code 19731 mostly owner-occupied?

87% of occupied units in ZIP code 19731 are owner-occupied, well above the national average.

What timezone is ZIP code 19731 in?

ZIP code 19731 observes the EST timezone.