11755 ZIP Code — Lake Grove, NY

Suffolk County, New York

ZIP code 11755 is located in Lake Grove, New York, within Suffolk County. It covers approximately 3.28 square miles and serves a population of 12,227 residents. This is a standard ZIP code in the Eastern (ET) timezone, served by area code 631.

About ZIP code 11755

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 $513,400. Owner-occupancy is high at 82%, well above the national average.

Median household income is $121,196. The poverty rate of 5% is below the national average. 40% 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 39 minutes suggests many residents work outside the immediate area.

Educational attainment is high — 48% of residents hold a bachelor's degree or higher, well above the national average of 33%.

Overall, ZIP code 11755 reflects a community defined by high homeownership and a significant Social Security-dependent population.

12,227

population

3.28

sq mi land

Standard

ZIP type

Eastern (ET)

timezone

11755 ZIP code map

Cities in ZIP code 11755

Below are the cities the US Postal Service accepts for ZIP code 11755. Using any city not on this list may result in mail delivery delays.

City	Status
Lake Grove	Acceptable
Lake Grove	Preferred

Nearby ZIP codes

11767 Nesconset (1.6 mi) 11720 Centereach (2.1 mi) 11779 Ronkonkoma (3 mi) 11790 Stony Brook (3.3 mi) 11794 Stony Brook (3.7 mi) 11780 Saint James (4 mi) 11738 Farmingville (4.4 mi) 11784 Selden (4.5 mi) 11749 Islandia (4.6 mi) 11749 Islandia (4.6 mi) 11787 Smithtown (4.7 mi) 00501 Holtsville (4.8 mi)

Demographics updated 05/2026

Population
Total population	12,227
Population density	3,728 / sq mi
State FIPS	36
County FIPS	103

Geography
Land area	3.28 sq mi
Water area	0.00 sq mi
Latitude	40.8589
Longitude	-73.1201
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	24.3%	22.6%	37.0%
$50k – $100k	18.5%	24.7%	27.0%
$100k – $200k	36.4%	34.6%	24.4%
Over $200k	20.8%	18.0%	11.5%

Demographics & statistics

12,227

Population

3,728

People per sq mi

41.4

Median age

$121,196

Median household income

$49,887

Per capita income

$513,400

Median home value

$2,136

Median monthly rent

81.7%

Home ownership

5.3%

Poverty rate

4.9%

Unemployment

3,431

Housing units

47.8%

Bachelor's or higher

Age distribution

Male Female

243

Under 5

219

386

5–9

347

573

10–14

517

410

15–19

369

482

20–24

435

724

25–34

653

651

35–44

586

1,020

45–54

918

598

55–59

539

389

60–64

350

524

65–74

472

332

75–84

299

100

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	2,751	22.5%
18 and over	9,476	77.5%
65 and over	1,818	14.9%
Median age	41.4 years

Race & ethnicity

White 74.2%

Asian 8.2%

Hispanic or Latino 7%

Two or more races 5.8%

Other race 2.5%

Black or African American 2.1%

American Indian / Alaska Native 0.1%

Group	Count	%
White	9,761	74.2%
Asian	1,081	8.2%
Hispanic or Latino	926	7%
Two or more races	757	5.8%
Other race	333	2.5%
Black or African American	282	2.1%
American Indian / Alaska Native	13	0.1%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	24.3%	22.6%	37.0%
$50k – $100k	18.5%	24.7%	27.0%
$100k – $200k	36.4%	34.6%	24.4%
Over $200k	20.8%	18.0%	11.5%

Under $10k 4.7%

$10k–$15k 2.4%

$15k–$25k 1.6%

$25k–$35k 3.7%

$35k–$50k 9.8%

$50k–$75k 8.4%

$75k–$100k 10.5%

$100k–$150k 18.9%

$150k–$200k 14.4%

$200k+ 25.6%

Range	% of households
Under $10k	4.7%
$10k–$15k	2.4%
$15k–$25k	1.6%
$25k–$35k	3.7%
$35k–$50k	9.8%
$50k–$75k	8.4%
$75k–$100k	10.5%
$100k–$150k	18.9%
$150k–$200k	14.4%
$200k+	25.6%
Median income	$121,196

Housing

Home values

Under $50k 1.3%

$50k–$100k 0.9%

$200k–$300k 3.2%

$300k–$500k 42.2%

$500k–$1M 50.8%

$1M+ 1.7%

Housing overview

Metric	Value
Median home value	$513,400
Median rent / month	$2,136
Owner occupied	81.7%
Renter occupied	18.3%
Vacant	1.9%
Single-family detached	82.2%
Large apartment buildings	4.2%
Mobile homes	0.1%
Median rooms	6.7
Avg household size (owned)	3.25

Year built

Era	%
2020 or later	0.0%
2010–2019	4.5%
2000–2009	9.7%
1990–1999	8.3%
1980–1989	4.1%
1970–1979	23.3%
1960–1969	29.0%
1950–1959	13.2%
1940–1949	3.3%
1939 or earlier	4.6%

Bedrooms

Size	% of units
No bedroom (studio)	2.2%
1 bedroom	8.5%
2 bedrooms	14.6%
3 bedrooms	30.7%
4 bedrooms	36.1%
5+ bedrooms	7.9%

Vehicles per household

Vehicles	% of households
No vehicle	6.6%
1 vehicle	23.1%
2 vehicles	35.6%
3 or more	34.7%

Heating fuel

Fuel type	%
Utility gas	42.5%
Electricity	3.0%
Propane / LP gas	0.9%
Fuel oil	52.3%
Wood	0.7%

Households & families

Household type	Count	%
Married-couple family	2,473	60.3%
Cohabiting couple	158	3.9%
Male householder, no spouse	704	17.2%
Female householder, no spouse	765	18.7%
Households with children under 18	1,316	32.1%
Households with seniors (65+)	1,460	35.6%
Average household size	2.97

Marital status

Status	Male	Female
Never married	36.1%	26.6%
Married	52.3%	54.4%
Separated	0.4%	1.2%
Widowed	3.7%	9.5%
Divorced	7.5%	8.3%

Education

Less than 9th grade 1.9%

Some HS, no diploma 3.0%

HS graduate 23.9%

Some college, no degree 14.9%

Associate's degree 8.5%

Bachelor's degree 27.4%

Graduate / professional 20.4%

Metric	%
HS diploma or higher	95.1%
Bachelor's or higher	47.8%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	131	3.7%
Kindergarten	174	4.9%
Elementary school	1,447	40.6%
High school	606	17.0%
College / grad school	1,204	33.8%

Employment

Industry of employment

Education & healthcare 30.9%

Professional & management 12.1%

Retail trade 9.5%

Finance & real estate 8.7%

Arts, food & hospitality 7.0%

Construction 6.5%

Public administration 6.4%

Transportation & utilities 5.5%

Manufacturing 5.0%

Other services 3.6%

Wholesale trade 2.5%

Information 2.4%

Occupation

Category	%
Management, business & arts	48.2%
Service	18.9%
Sales & office	20.6%
Natural resources & construction	6.9%
Production & transportation	5.5%

Employment type

Type	%
Private sector	72.9%
Government	19.5%
Self-employed	7.6%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	75.6%
Carpool	9.4%
Public transit	7.0%
Walk	0.2%
Work from home	7.5%
Other means	0.4%
Avg commute (minutes)	38.5

Poverty

All people 5.3%

Under 18 years 2.1%

18 and over 6.2%

Married-couple families 2.0%

Female-led households 4.6%

Income support

Source	% of households
Social Security	39.9%
Retirement income	29.2%
Supplemental Security	4.6%
Cash public assistance	1.3%
Food stamps / SNAP	5.4%

Health indicators

Condition	%
Obesity	25.6%
High blood pressure	25.9%
High cholesterol	28.4%
Diabetes	7.1%
Heart disease	4.6%
Stroke	2.1%
Asthma	9.1%
Arthritis	18.1%
Kidney disease	2.2%
Pulmonary disease	4.7%
Cancer	6.2%

Behavior / access	%
Smoking	13.2%
Binge drinking	18.9%
No physical activity	19.4%
Less than 7 hrs sleep	33.4%
Depression	16.7%
Fair or poor health	8.9%
Poor mental health	12.8%
Poor physical health	7.5%
No health insurance	9.0%
Visited doctor (checkup)	77.6%
Visited dentist	71.9%
Cholesterol screening	92.1%
Teeth loss	8.7%

Veterans & disability

Veterans	Count	%
Civilian veterans	315	3.3%

Disability	%
Any disability	10.5%
Under 18	6.2%
18–64 years	8.1%
65 and over	27.1%

Health insurance coverage

Type	%
Private insurance	84.4%
Public insurance	23.2%
No insurance	4.4%
Uninsured under 19	2.4%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	11,765	96.2%
Spanish	367	3.1%
Other Indo-European	41	0.3%
Asian & Pacific Islander	125	1.1%
Other languages	156	1.3%

Place of birth & citizenship

Origin	Count	%
Native born (US)	10,683	87.4%
Born in same state	10,580	86.5%
Born in different state	9,841	80.5%
Foreign born	103	0.8%
Naturalized citizen	1,544	12.6%
Not a US citizen	1,003	65.0%

Ancestry

Ancestry	Count	%
Italian	2,781	22.7%
Arab	1,165	9.5%
French	431	3.5%
Irish	93	0.8%
Polish	71	0.6%

Ancestry	Count	%
Dutch	40	0.3%
German	22	0.2%
Norwegian	10	0.1%
English	8	0.1%

Technology access

Metric	% of households
Computer access	33.5%
Internet access	97.6%

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

Frequently asked questions about ZIP code 11755

What city is ZIP code 11755 in?

ZIP code 11755 is primarily assigned to Lake Grove, New York.

What county is ZIP code 11755 in?

ZIP code 11755 falls within Suffolk County, New York.

Is ZIP code 11755 mostly owner-occupied?

82% of occupied units in ZIP code 11755 are owner-occupied, well above the national average.

How educated is the population of ZIP code 11755?

48% of residents hold a bachelor's degree or higher — well above the national average of ~33%, reflecting a highly educated population.

Does ZIP code 11755 have a large retiree population?

40% of households in ZIP code 11755 receive Social Security income, suggesting a significant retiree or disability population.

What is the typical home value in ZIP code 11755?

The median home value in ZIP code 11755 is $513,400.

What timezone is ZIP code 11755 in?

ZIP code 11755 observes the EST timezone.