11731 ZIP Code — East Northport, NY

Suffolk County, New York

ZIP code 11731 is located in East Northport, New York, within Suffolk County. It covers approximately 8.32 square miles and serves a population of 30,714 residents. This is a standard ZIP code in the Eastern (ET) timezone, served by area code 631.

About ZIP code 11731

The housing stock consists of predominantly single-family detached homes. Most homes were built in the 1960s, giving the area an established character. Median home value is $603,200. Owner-occupancy is high at 91%, well above the national average.

The gap between median ($151,291) and mean household income suggests income inequality — a small number of higher earners pull the average up. The poverty rate of 4% is below the national average. 35% of households receive Social Security income, suggesting a notable retiree or disability population.

The dominant occupation class is management, business, and professional, with education and healthcare as the leading industry. An above-average commute of 36 minutes suggests many residents work outside the immediate area.

Educational attainment is high — 50% of residents hold a bachelor's degree or higher, well above the national average of 33%.

Overall, ZIP code 11731 reflects a community defined by high homeownership and a significant Social Security-dependent population.

30,714

population

8.32

sq mi land

Standard

ZIP type

Eastern (ET)

timezone

11731 ZIP code map

Cities in ZIP code 11731

Below are the cities the US Postal Service accepts for ZIP code 11731. Using any city not on this list may result in mail delivery delays.

City	Status
East Northport	Acceptable
East Northport	Preferred

Nearby ZIP codes

11725 Commack (2.2 mi) 11740 Greenlawn (2.6 mi) 11746 Huntington Station (3.8 mi) 11721 Centerport (3.9 mi) 11768 Northport (4.1 mi) 11754 Kings Park (4.2 mi) 11743 Huntington (5.3 mi) 11787 Smithtown (5.6 mi) 11788 Hauppauge (6.1 mi) 11717 Brentwood (6.1 mi) 11729 Deer Park (6.5 mi) 11747 Melville (6.8 mi)

Demographics updated 05/2026

Population
Total population	30,714
Population density	3,692 / sq mi
State FIPS	36
County FIPS	103

Geography
Land area	8.32 sq mi
Water area	0.00 sq mi
Latitude	40.8568
Longitude	-73.3154
Timezone	Eastern (ET)
Area code	631

Total population by age

Gender

Race & ethnicity

Economics updated 05/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	14.7%	22.6%	37.0%
$50k – $100k	20.1%	24.7%	27.0%
$100k – $200k	43.4%	34.6%	24.4%
Over $200k	21.8%	18.0%	11.5%

Demographics & statistics

30,714

Population

3,692

People per sq mi

45.7

Median age

$151,291

Median household income

$63,062

Per capita income

$603,200

Median home value

$2,084

Median monthly rent

91.3%

Home ownership

4.2%

Poverty rate

3.5%

Unemployment

10,155

Housing units

49.7%

Bachelor's or higher

Age distribution

Male Female

953

Under 5

955

949

5–9

951

806

10–14

808

865

15–19

868

1,034

20–24

1,038

1,399

25–34

1,404

1,549

35–44

1,554

2,267

45–54

2,273

1,393

55–59

1,397

1,541

60–64

1,545

1,363

65–74

1,368

811

75–84

813

404

85+

406

← Male

Female →

Age summary

Group	Count	%
Under 18	6,571	21.4%
18 and over	24,143	78.6%
65 and over	5,165	16.8%
Median age	45.7 years

Race & ethnicity

White 80.5%

Two or more races 5.6%

Hispanic or Latino 5.4%

Asian 4.3%

Other race 2.1%

Black or African American 2.1%

Group	Count	%
White	26,147	80.5%
Two or more races	1,805	5.6%
Hispanic or Latino	1,770	5.4%
Asian	1,397	4.3%
Other race	684	2.1%
Black or African American	681	2.1%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	14.7%	22.6%	37.0%
$50k – $100k	20.1%	24.7%	27.0%
$100k – $200k	43.4%	34.6%	24.4%
Over $200k	21.8%	18.0%	11.5%

Under $10k 2.3%

$10k–$15k 1.3%

$15k–$25k 2.3%

$25k–$35k 2.6%

$35k–$50k 3.1%

$50k–$75k 11.2%

$75k–$100k 7.7%

$100k–$150k 18.7%

$150k–$200k 21.1%

$200k+ 29.8%

Range	% of households
Under $10k	2.3%
$10k–$15k	1.3%
$15k–$25k	2.3%
$25k–$35k	2.6%
$35k–$50k	3.1%
$50k–$75k	11.2%
$75k–$100k	7.7%
$100k–$150k	18.7%
$150k–$200k	21.1%
$200k+	29.8%
Median income	$151,291

Housing

Home values

Under $50k 0.4%

$50k–$100k 1.5%

$100k–$150k 0.5%

$200k–$300k 1.0%

$300k–$500k 22.9%

$500k–$1M 70.5%

$1M+ 3.1%

Housing overview

Metric	Value
Median home value	$603,200
Median rent / month	$2,084
Owner occupied	91.3%
Renter occupied	8.7%
Vacant	3.7%
Single-family detached	91.5%
Large apartment buildings	1.2%
Mobile homes	0.1%
Median rooms	7.2
Avg household size (owned)	2.93

Year built

Era	%
2020 or later	0.6%
2010–2019	2.3%
2000–2009	1.7%
1990–1999	2.8%
1980–1989	2.5%
1970–1979	7.5%
1960–1969	37.1%
1950–1959	31.0%
1940–1949	5.4%
1939 or earlier	9.0%

Bedrooms

Size	% of units
No bedroom (studio)	0.2%
1 bedroom	3.5%
2 bedrooms	10.0%
3 bedrooms	37.9%
4 bedrooms	34.4%
5+ bedrooms	14.1%

Vehicles per household

Vehicles	% of households
No vehicle	3.1%
1 vehicle	24.3%
2 vehicles	40.2%
3 or more	32.3%

Heating fuel

Fuel type	%
Utility gas	56.1%
Electricity	4.7%
Propane / LP gas	1.3%
Fuel oil	36.9%
Wood	0.5%

Households & families

Household type	Count	%
Married-couple family	6,671	62.5%
Cohabiting couple	278	2.6%
Male householder, no spouse	1,448	13.6%
Female householder, no spouse	2,277	21.3%
Households with children under 18	3,481	32.6%
Households with seniors (65+)	3,727	34.9%
Average household size	2.85

Marital status

Status	Male	Female
Never married	32.3%	26.5%
Married	57.4%	52.6%
Separated	0.5%	0.7%
Widowed	3.3%	9.3%
Divorced	6.6%	11.0%

Education

Less than 9th grade 1.7%

Some HS, no diploma 2.0%

HS graduate 20.4%

Some college, no degree 16.9%

Associate's degree 9.2%

Bachelor's degree 26.5%

Graduate / professional 23.2%

Metric	%
HS diploma or higher	96.3%
Bachelor's or higher	49.7%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	774	10.8%
Kindergarten	281	3.9%
Elementary school	2,773	38.6%
High school	1,538	21.4%
College / grad school	1,816	25.3%

Employment

Industry of employment

Education & healthcare 31.6%

Professional & management 11.6%

Finance & real estate 11.3%

Construction 8.7%

Retail trade 8.5%

Public administration 6.0%

Arts, food & hospitality 5.6%

Manufacturing 4.7%

Information 3.6%

Transportation & utilities 2.9%

Other services 2.9%

Wholesale trade 2.6%

Agriculture & mining 0.1%

Occupation

Category	%
Management, business & arts	54.0%
Service	14.1%
Sales & office	20.7%
Natural resources & construction	6.5%
Production & transportation	4.8%

Employment type

Type	%
Private sector	75.8%
Government	20.7%
Self-employed	3.5%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	74.5%
Carpool	6.2%
Public transit	7.9%
Walk	0.9%
Work from home	10.3%
Other means	0.2%
Avg commute (minutes)	36.3

Poverty

All people 4.2%

Under 18 years 4.5%

18 and over 4.1%

Married-couple families 0.8%

Female-led households 12.7%

Income support

Source	% of households
Social Security	35.0%
Retirement income	31.6%
Supplemental Security	2.2%
Cash public assistance	1.5%
Food stamps / SNAP	3.5%

Health indicators

Condition	%
Obesity	25.6%
High blood pressure	27.8%
High cholesterol	30.9%
Diabetes	7.6%
Heart disease	5.2%
Stroke	2.3%
Asthma	9.0%
Arthritis	19.7%
Kidney disease	2.4%
Pulmonary disease	4.9%
Cancer	7.1%

Behavior / access	%
Smoking	12.4%
Binge drinking	18.0%
No physical activity	19.0%
Less than 7 hrs sleep	32.5%
Depression	16.3%
Fair or poor health	8.9%
Poor mental health	12.1%
Poor physical health	7.7%
No health insurance	8.1%
Visited doctor (checkup)	78.9%
Visited dentist	73.3%
Cholesterol screening	93.4%
Teeth loss	8.4%

Veterans & disability

Veterans	Count	%
Civilian veterans	1,281	5.3%

Disability	%
Any disability	10.4%
Under 18	4.0%
18–64 years	9.2%
65 and over	22.7%

Health insurance coverage

Type	%
Private insurance	86.4%
Public insurance	24.8%
No insurance	1.7%
Uninsured under 19	1.3%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	28,806	93.8%
Spanish	810	2.8%
Other Indo-European	402	1.4%
Asian & Pacific Islander	113	0.4%
Other languages	295	1.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	27,926	90.9%
Born in same state	27,629	90.0%
Born in different state	25,522	83.1%
Foreign born	297	1.0%
Naturalized citizen	2,788	9.1%
Not a US citizen	2,153	77.2%

Ancestry

Ancestry	Count	%
Italian	6,862	22.3%
Arab	1,778	5.8%
French	1,655	5.4%
Polish	411	1.3%
Irish	191	0.6%

Ancestry	Count	%
Dutch	170	0.6%
English	116	0.4%
Norwegian	109	0.4%
German	34	0.1%

Technology access

Metric	% of households
Computer access	34.8%
Internet access	97.6%

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

Frequently asked questions about ZIP code 11731

What city is ZIP code 11731 in?

ZIP code 11731 is primarily assigned to East Northport, New York.

What county is ZIP code 11731 in?

ZIP code 11731 falls within Suffolk County, New York.

Is ZIP code 11731 mostly owner-occupied?

91% of occupied units in ZIP code 11731 are owner-occupied, well above the national average.

How educated is the population of ZIP code 11731?

50% of residents hold a bachelor's degree or higher — well above the national average of ~33%, reflecting a highly educated population.

What is the median household income in ZIP code 11731?

The median household income in ZIP code 11731 is $151,291, above the national median of ~$75,000.

What is the typical home value in ZIP code 11731?

The median home value in ZIP code 11731 is $603,200.

What timezone is ZIP code 11731 in?

ZIP code 11731 observes the EST timezone.