11751 ZIP Code — Islip, NY

Suffolk County, New York

ZIP code 11751 is located in Islip, New York, within Suffolk County. It covers approximately 3.96 square miles and serves a population of 13,501 residents. This is a standard ZIP code in the Eastern (ET) timezone, served by area code 631.

About ZIP code 11751

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 $469,300. Owner-occupancy is high at 84%, well above the national average.

Median household income is $114,185. The poverty rate of 5% 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. The average commute of 29 minutes is near the national average.

Educational attainment is near the national average, with 35% of residents holding a bachelor's degree or higher.

Overall, ZIP code 11751 reflects a community defined by high homeownership and a significant Social Security-dependent population.

13,501

population

3.96

sq mi land

Standard

ZIP type

Eastern (ET)

timezone

11751 ZIP code map

Cities in ZIP code 11751

Below are the cities the US Postal Service accepts for ZIP code 11751. Using any city not on this list may result in mail delivery delays.

City	Status
Islip	Acceptable
Islip	Preferred

Nearby ZIP codes

11706 Bay Shore (2.3 mi) 11730 East Islip (2.4 mi) 11752 Islip Terrace (2.7 mi) 11718 Brightwaters (2.7 mi) 11722 Central Islip (3.5 mi) 11717 Brentwood (4 mi) 11769 Oakdale (4.5 mi) 11795 West Islip (4.5 mi) 11716 Bohemia (5.4 mi) 11749 Islandia (5.6 mi) 11749 Islandia (5.6 mi) 11796 West Sayville (5.8 mi)

Demographics updated 06/2026

Population
Total population	13,501
Population density	3,409 / sq mi
State FIPS	36
County FIPS	103

Geography
Land area	3.96 sq mi
Water area	0.64 sq mi
Latitude	40.7312
Longitude	-73.2137
Timezone	Eastern (ET)
Area code	631

Total population by age

Gender

Race & ethnicity

Economics updated 06/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	21.4%	22.6%	37.0%
$50k – $100k	24.9%	24.7%	27.0%
$100k – $200k	36.8%	34.6%	24.4%
Over $200k	16.9%	18.0%	11.5%

Demographics & statistics

13,501

Population

3,409

People per sq mi

45.6

Median age

$114,185

Median household income

$51,894

Per capita income

$469,300

Median home value

$2,311

Median monthly rent

83.7%

Home ownership

4.9%

Poverty rate

5.3%

Unemployment

4,611

Housing units

35.4%

Bachelor's or higher

Age distribution

Male Female

331

Under 5

346

294

5–9

308

297

10–14

311

323

15–19

338

311

20–24

325

924

25–34

966

773

35–44

808

830

45–54

869

568

55–59

595

633

60–64

663

712

65–74

744

397

75–84

416

205

85+

214

← Male

Female →

Age summary

Group	Count	%
Under 18	2,305	17.1%
18 and over	11,196	82.9%
65 and over	2,688	19.9%
Median age	45.6 years

Race & ethnicity

White 73%

Hispanic or Latino 8.2%

Two or more races 7%

Asian 5.7%

Other race 3.2%

Black or African American 2.9%

Group	Count	%
White	10,736	73%
Hispanic or Latino	1,201	8.2%
Two or more races	1,023	7%
Asian	832	5.7%
Other race	477	3.2%
Black or African American	433	2.9%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	21.4%	22.6%	37.0%
$50k – $100k	24.9%	24.7%	27.0%
$100k – $200k	36.8%	34.6%	24.4%
Over $200k	16.9%	18.0%	11.5%

Under $10k 5.3%

$10k–$15k 0.6%

$15k–$25k 3.0%

$25k–$35k 3.4%

$35k–$50k 6.8%

$50k–$75k 15.5%

$75k–$100k 8.8%

$100k–$150k 23.4%

$150k–$200k 12.9%

$200k+ 20.2%

Range	% of households
Under $10k	5.3%
$10k–$15k	0.6%
$15k–$25k	3.0%
$25k–$35k	3.4%
$35k–$50k	6.8%
$50k–$75k	15.5%
$75k–$100k	8.8%
$100k–$150k	23.4%
$150k–$200k	12.9%
$200k+	20.2%
Median income	$114,185

Housing

Home values

Under $50k 1.9%

$50k–$100k 1.2%

$100k–$150k 1.9%

$150k–$200k 4.0%

$200k–$300k 6.3%

$300k–$500k 42.5%

$500k–$1M 40.5%

$1M+ 1.7%

Housing overview

Metric	Value
Median home value	$469,300
Median rent / month	$2,311
Owner occupied	83.7%
Renter occupied	16.3%
Vacant	5.1%
Single-family detached	70.2%
Large apartment buildings	7.9%
Mobile homes	1.8%
Median rooms	6.4
Avg household size (owned)	2.67

Year built

Era	%
2020 or later	0.0%
2010–2019	0.4%
2000–2009	3.2%
1990–1999	4.2%
1980–1989	13.5%
1970–1979	14.8%
1960–1969	23.9%
1950–1959	19.9%
1940–1949	5.0%
1939 or earlier	15.2%

Bedrooms

Size	% of units
No bedroom (studio)	2.4%
1 bedroom	11.1%
2 bedrooms	27.2%
3 bedrooms	27.7%
4 bedrooms	25.8%
5+ bedrooms	5.8%

Vehicles per household

Vehicles	% of households
No vehicle	8.8%
1 vehicle	35.3%
2 vehicles	28.2%
3 or more	27.7%

Heating fuel

Fuel type	%
Utility gas	44.6%
Electricity	12.0%
Propane / LP gas	3.2%
Fuel oil	39.2%
Wood	0.5%

Households & families

Household type	Count	%
Married-couple family	2,744	53.0%
Cohabiting couple	140	2.7%
Male householder, no spouse	936	18.1%
Female householder, no spouse	1,358	26.2%
Households with children under 18	1,229	23.7%
Households with seniors (65+)	1,852	35.8%
Average household size	2.59

Marital status

Status	Male	Female
Never married	31.0%	29.3%
Married	55.6%	49.9%
Separated	2.6%	0.1%
Widowed	3.7%	11.6%
Divorced	7.0%	9.1%

Education

Less than 9th grade 8.6%

Some HS, no diploma 3.7%

HS graduate 27.7%

Some college, no degree 14.1%

Associate's degree 10.5%

Bachelor's degree 18.7%

Graduate / professional 16.6%

Metric	%
HS diploma or higher	87.7%
Bachelor's or higher	35.4%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	83	3.2%
Kindergarten	161	6.3%
Elementary school	871	34.0%
High school	532	20.8%
College / grad school	914	35.7%

Employment

Industry of employment

Education & healthcare 29.2%

Professional & management 15.0%

Retail trade 12.2%

Finance & real estate 7.3%

Manufacturing 7.0%

Construction 5.9%

Public administration 5.0%

Transportation & utilities 4.9%

Arts, food & hospitality 4.9%

Other services 3.8%

Wholesale trade 2.5%

Information 2.3%

Occupation

Category	%
Management, business & arts	48.6%
Service	15.3%
Sales & office	21.7%
Natural resources & construction	6.7%
Production & transportation	7.7%

Employment type

Type	%
Private sector	79.0%
Government	17.5%
Self-employed	2.9%
Unpaid family workers	0.6%

Commute

Method	%
Drive alone	81.2%
Carpool	6.6%
Public transit	3.6%
Walk	0.6%
Work from home	7.3%
Other means	0.7%
Avg commute (minutes)	29.4

Poverty

All people 4.9%

Under 18 years 3.1%

18 and over 5.2%

Married-couple families 0.5%

Female-led households 16.9%

Income support

Source	% of households
Social Security	34.8%
Retirement income	31.6%
Supplemental Security	8.3%
Cash public assistance	0.8%
Food stamps / SNAP	4.3%

Health indicators

Condition	%
Obesity	26.5%
High blood pressure	26.6%
High cholesterol	29.7%
Diabetes	7.3%
Heart disease	4.8%
Stroke	2.2%
Asthma	9.4%
Arthritis	18.7%
Kidney disease	2.3%
Pulmonary disease	5.0%
Cancer	6.4%

Behavior / access	%
Smoking	13.6%
Binge drinking	18.9%
No physical activity	19.9%
Less than 7 hrs sleep	33.3%
Depression	17.0%
Fair or poor health	9.4%
Poor mental health	13.0%
Poor physical health	7.9%
No health insurance	9.6%
Visited doctor (checkup)	77.9%
Visited dentist	71.3%
Cholesterol screening	92.2%
Teeth loss	9.5%

Veterans & disability

Veterans	Count	%
Civilian veterans	493	4.4%

Disability	%
Any disability	12.9%
Under 18	6.7%
18–64 years	9.3%
65 and over	29.7%

Health insurance coverage

Type	%
Private insurance	79.9%
Public insurance	32.2%
No insurance	3.7%
Uninsured under 19	2.9%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	12,824	95.0%
Spanish	587	4.6%
Other Indo-European	387	3.0%
Asian & Pacific Islander	40	0.3%
Other languages	137	1.1%

Place of birth & citizenship

Origin	Count	%
Native born (US)	12,102	89.6%
Born in same state	12,077	89.5%
Born in different state	11,008	81.5%
Foreign born	25	0.2%
Naturalized citizen	1,399	10.4%
Not a US citizen	810	57.9%

Ancestry

Ancestry	Count	%
Italian	2,910	21.6%
French	912	6.8%
Arab	498	3.7%
Norwegian	147	1.1%

Ancestry	Count	%
Polish	112	0.8%
Irish	101	0.7%
German	56	0.4%
English	17	0.1%

Technology access

Metric	% of households
Computer access	38.4%
Internet access	89.6%

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

Frequently asked questions about ZIP code 11751

What city is ZIP code 11751 in?

ZIP code 11751 is primarily assigned to Islip, New York.

What county is ZIP code 11751 in?

ZIP code 11751 falls within Suffolk County, New York.

Is ZIP code 11751 mostly owner-occupied?

84% of occupied units in ZIP code 11751 are owner-occupied, well above the national average.

What is the typical home value in ZIP code 11751?

The median home value in ZIP code 11751 is $469,300.

What is the median household income in ZIP code 11751?

The median household income in ZIP code 11751 is $114,185, above the national median of ~$75,000.

What is the population of ZIP code 11751?

ZIP code 11751 has an estimated population of 13,501 residents, with a density of 3,406 people per square mile.

What timezone is ZIP code 11751 in?

ZIP code 11751 observes the EST timezone.