11749 ZIP Code — Islandia, NY

Suffolk County, New York

ZIP code 11749 is located in Islandia, New York, within Suffolk County. It covers approximately 2.19 square miles and serves a population of 3,568 residents. This is a standard ZIP code in the Eastern (ET) timezone, served by area code 631/516.

About ZIP code 11749

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 $422,500. Owner-occupancy is high at 97%, well above the national average.

Median household income is $109,964. The poverty rate of 5% is below the national average. 31% 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 28 minutes is near the national average.

Educational attainment is near the national average, with 28% of residents holding a bachelor's degree or higher.

Overall, ZIP code 11749 reflects a community defined by high homeownership and a significant Social Security-dependent population.

3,568

population

2.19

sq mi land

Standard

ZIP type

Eastern (ET)

timezone

11749 ZIP code map

Cities in ZIP code 11749

Below are the cities the US Postal Service accepts for ZIP code 11749. Using any city not on this list may result in mail delivery delays.

City	Status
Islandia	Acceptable
Islandia	Acceptable
Islandia	Preferred

Nearby ZIP codes

11788 Hauppauge (2.1 mi) 11788 Hauppauge (2.1 mi) 11722 Central Islip (2.2 mi) 11722 Central Islip (2.2 mi) 11779 Ronkonkoma (3 mi) 11779 Ronkonkoma (3 mi) 11767 Nesconset (3 mi) 11767 Nesconset (3 mi) 11752 Islip Terrace (3.2 mi) 11752 Islip Terrace (3.2 mi) 11716 Bohemia (3.6 mi) 11716 Bohemia (3.6 mi)

Demographics updated 05/2026

Population
Total population	3,568
Population density	1,629 / sq mi
State FIPS	36
County FIPS	103

Geography
Land area	2.19 sq mi
Water area	0.00 sq mi
Latitude	40.8065
Longitude	-73.1743
Timezone	Eastern (ET)
Area code	631/516

Total population by age

Gender

Race & ethnicity

Economics updated 05/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	29.5%	22.6%	37.0%
$50k – $100k	32.8%	24.7%	27.0%
$100k – $200k	28.1%	34.6%	24.4%
Over $200k	9.7%	18.0%	11.5%

Demographics & statistics

3,568

Population

1,629

People per sq mi

38.0

Median age

$109,964

Median household income

$41,382

Per capita income

$422,500

Median home value

$1,830

Median monthly rent

96.8%

Home ownership

4.8%

Poverty rate

4.0%

Unemployment

1,162

Housing units

28.3%

Bachelor's or higher

Age distribution

Male Female

Under 5

5–9

113

10–14

106

15–19

20–24

359

25–34

406

186

35–44

210

204

45–54

231

132

55–59

149

111

60–64

126

168

65–74

189

75–84

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	680	19.1%
18 and over	2,888	80.9%
65 and over	549	15.4%
Median age	38.0 years

Race & ethnicity

White 32.7%

Hispanic or Latino 23.8%

Other race 16.4%

Two or more races 10.2%

Black or African American 9.3%

Asian 6.9%

American Indian / Alaska Native 0.6%

Group	Count	%
White	1,533	32.7%
Hispanic or Latino	1,114	23.8%
Other race	769	16.4%
Two or more races	478	10.2%
Black or African American	437	9.3%
Asian	321	6.9%
American Indian / Alaska Native	30	0.6%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	29.5%	22.6%	37.0%
$50k – $100k	32.8%	24.7%	27.0%
$100k – $200k	28.1%	34.6%	24.4%
Over $200k	9.7%	18.0%	11.5%

Under $10k 1.4%

$10k–$15k 0.8%

$15k–$25k 2.2%

$25k–$35k 3.7%

$35k–$50k 13.8%

$50k–$75k 11.6%

$75k–$100k 9.8%

$100k–$150k 23.5%

$150k–$200k 14.5%

$200k+ 18.7%

Range	% of households
Under $10k	1.4%
$10k–$15k	0.8%
$15k–$25k	2.2%
$25k–$35k	3.7%
$35k–$50k	13.8%
$50k–$75k	11.6%
$75k–$100k	9.8%
$100k–$150k	23.5%
$150k–$200k	14.5%
$200k+	18.7%
Median income	$109,964

Housing

Home values

Under $50k 4.4%

$100k–$150k 0.4%

$150k–$200k 0.6%

$200k–$300k 12.6%

$300k–$500k 58.0%

$500k–$1M 20.8%

$1M+ 3.2%

Housing overview

Metric	Value
Median home value	$422,500
Median rent / month	$1,830
Owner occupied	96.8%
Renter occupied	3.2%
Vacant	7.1%
Single-family detached	82.1%
Large apartment buildings	2.3%
Mobile homes	0.0%
Median rooms	6.9
Avg household size (owned)	3.15

Year built

Era	%
2020 or later	0.0%
2010–2019	1.7%
2000–2009	4.8%
1990–1999	6.0%
1980–1989	16.3%
1970–1979	17.6%
1960–1969	46.5%
1950–1959	2.3%
1940–1949	2.5%
1939 or earlier	2.4%

Bedrooms

Size	% of units
No bedroom (studio)	0.7%
1 bedroom	10.5%
2 bedrooms	5.6%
3 bedrooms	31.6%
4 bedrooms	37.3%
5+ bedrooms	14.4%

Vehicles per household

Vehicles	% of households
No vehicle	3.1%
1 vehicle	20.6%
2 vehicles	37.6%
3 or more	38.6%

Heating fuel

Fuel type	%
Utility gas	19.1%
Electricity	5.0%
Propane / LP gas	0.6%
Fuel oil	74.2%
Solar	1.0%

Households & families

Household type	Count	%
Married-couple family	616	55.3%
Cohabiting couple	85	7.6%
Male householder, no spouse	82	7.4%
Female householder, no spouse	330	29.6%
Households with children under 18	356	32.0%
Households with seniors (65+)	381	34.2%
Average household size	3.14

Marital status

Status	Male	Female
Never married	28.4%	32.3%
Married	59.7%	36.7%
Separated	1.6%	7.6%
Widowed	1.6%	9.6%
Divorced	8.7%	13.8%

Education

Less than 9th grade 6.4%

Some HS, no diploma 3.9%

HS graduate 29.6%

Some college, no degree 19.0%

Associate's degree 12.7%

Bachelor's degree 14.8%

Graduate / professional 13.5%

Metric	%
HS diploma or higher	89.7%
Bachelor's or higher	28.3%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	10	1.2%
Kindergarten	68	8.5%
Elementary school	323	40.3%
High school	104	13.0%
College / grad school	297	37.0%

Employment

Industry of employment

Education & healthcare 24.5%

Retail trade 20.0%

Manufacturing 12.4%

Professional & management 9.7%

Arts, food & hospitality 6.6%

Transportation & utilities 6.3%

Other services 5.5%

Finance & real estate 4.6%

Public administration 4.6%

Information 2.3%

Construction 1.8%

Wholesale trade 1.7%

Occupation

Category	%
Management, business & arts	28.5%
Service	17.5%
Sales & office	26.6%
Natural resources & construction	10.8%
Production & transportation	16.6%

Employment type

Type	%
Private sector	82.2%
Government	11.6%
Self-employed	5.3%
Unpaid family workers	0.9%

Commute

Method	%
Drive alone	79.2%
Carpool	7.0%
Public transit	1.4%
Walk	2.1%
Work from home	5.3%
Other means	5.0%
Avg commute (minutes)	27.5

Poverty

All people 4.8%

Under 18 years 0.0%

18 and over 5.9%

Married-couple families 1.5%

Female-led households 0.0%

Income support

Source	% of households
Social Security	30.7%
Retirement income	18.0%
Supplemental Security	1.2%
Cash public assistance	2.9%
Food stamps / SNAP	8.6%

Health indicators

Condition	%
Obesity	28.1%
High blood pressure	28.8%
High cholesterol	28.8%
Diabetes	8.9%
Heart disease	5.4%
Stroke	2.6%
Asthma	9.4%
Arthritis	19.5%
Kidney disease	2.7%
Pulmonary disease	5.2%
Cancer	6.4%

Behavior / access	%
Smoking	13.9%
Binge drinking	17.0%
No physical activity	24.7%
Less than 7 hrs sleep	35.3%
Depression	15.8%
Fair or poor health	11.8%
Poor mental health	13.2%
Poor physical health	8.7%
No health insurance	14.3%
Visited doctor (checkup)	78.6%
Visited dentist	66.5%
Cholesterol screening	91.7%
Teeth loss	11.8%

Veterans & disability

Veterans	Count	%
Civilian veterans	142	4.9%

Disability	%
Any disability	6.6%
Under 18	1.2%
18–64 years	5.1%
65 and over	20.0%

Health insurance coverage

Type	%
Private insurance	72.8%
Public insurance	32.7%
No insurance	1.9%
Uninsured under 19	0.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	3,389	95.0%
Spanish	470	13.9%
Other Indo-European	294	8.7%
Asian & Pacific Islander	116	3.4%
Other languages	60	1.8%

Place of birth & citizenship

Origin	Count	%
Native born (US)	2,271	63.6%
Born in same state	2,206	61.8%
Born in different state	2,122	59.5%
Foreign born	65	1.8%
Naturalized citizen	1,297	36.4%
Not a US citizen	945	72.9%

Ancestry

Ancestry	Count	%
Arab	192	5.4%
Italian	142	4%
French	58	1.6%

Ancestry	Count	%
German	20	0.6%
Polish	10	0.3%

Technology access

Metric	% of households
Computer access	31.2%
Internet access	98.7%

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

Frequently asked questions about ZIP code 11749

What city is ZIP code 11749 in?

ZIP code 11749 is primarily assigned to Islandia, New York.

What county is ZIP code 11749 in?

ZIP code 11749 falls within Suffolk County, New York.

Is ZIP code 11749 mostly owner-occupied?

97% of occupied units in ZIP code 11749 are owner-occupied, well above the national average.

What is the typical home value in ZIP code 11749?

The median home value in ZIP code 11749 is $422,500.

What is the median household income in ZIP code 11749?

The median household income in ZIP code 11749 is $109,964, above the national median of ~$75,000.

What is the population of ZIP code 11749?

ZIP code 11749 has an estimated population of 3,568 residents, with a density of 1,631 people per square mile.

What timezone is ZIP code 11749 in?

ZIP code 11749 observes the EST timezone.