Mount Sinai ZIP Code List — Suffolk County, NY

There is one unique ZIP code in Mount Sinai, New York and it is 11766. Area code: 631/516.

ZIP codes

6.03

sq mi land

1.44

sq mi water

631/516

area code

Mount Sinai, NY ZIP code map

About Mount Sinai, NY

Mount Sinai is a charming hamlet located in Suffolk County, New York. Nestled on Long Island's North Shore, it offers a serene, suburban atmosphere that attracts both families and retirees. With its picturesque landscapes and friendly community, Mount Sinai has become a desirable place to call home.

Location & geography

Mount Sinai is situated approximately 60 miles east of New York City, making it a peaceful retreat away from the city's hustle and bustle. The hamlet is bordered by neighboring towns such as Port Jefferson to the south, Rocky Point to the east, and Miller Place to the northwest, each contributing to the region's vibrant community. The area spans a total of 6.03 square miles of land and includes 1.44 square miles of water, offering a mix of terrain that includes scenic views along the shoreline.

Community & economy

The community of Mount Sinai is characterized by its close-knit neighborhoods and a strong sense of local identity. Residents often participate in community events and take pride in supporting local businesses, contributing to a thriving local economy. The daily life in Mount Sinai revolves around family-oriented activities, outdoor recreation, and a healthy balance of work and leisure.

Transportation

Mount Sinai is accessible via major roadways, including Route 25, which connects to other parts of Long Island, making commuting relatively convenient. The nearest airport is Long Island MacArthur Airport, located approximately 20 miles to the west, providing residents with options for air travel. Public transportation options include local buses that connect to surrounding areas, enhancing mobility for residents without personal vehicles.

History

Mount Sinai was originally settled in the 1600s and has evolved significantly over the centuries as it transitioned from an agricultural community to a suburban enclave. The hamlet developed key industries, such as farming and later residential development, which attracted many families seeking a quieter lifestyle away from the urban centers. Notable events in its history include the establishment of local schools and parks that have become integral to the community's identity.

Did you know?

A surprising fact about Mount Sinai is that it is home to the Mount Sinai Harbor, which offers beautiful views and recreational opportunities for locals and visitors alike. Additionally, the area is known for its community events, such as the annual Mount Sinai Street Fair, that foster engagement among residents.

ZIP codes for Mount Sinai, NY (1)

ZIP code	City	County	Map
11766	Mount Sinai	Suffolk	View map

Demographics & statistics

11,476

Population

46.5

Median age

$146,042

Median household income

$59,558

Per capita income

$590,000

Median home value

$3,308

Median monthly rent

97.7%

Home ownership

1.8%

Poverty rate

6.0%

Unemployment

3,908

Housing units

49.2%

Bachelor's or higher

Age distribution

Male Female

244

Under 5

234

375

5–9

358

432

10–14

413

424

15–19

406

276

20–24

263

299

25–34

285

753

35–44

720

883

45–54

845

339

55–59

325

314

60–64

301

869

65–74

831

534

75–84

511

124

85+

118

← Male

Female →

Age summary

Group	Count	%
Under 18	2,699	23.5%
18 and over	8,777	76.5%
65 and over	2,987	26.0%
Median age	46.5 years

Race & ethnicity

White 84.3%

Two or more races 4.3%

Hispanic or Latino 4.2%

Asian 3.8%

Black or African American 1.9%

Other race 1.5%

American Indian / Alaska Native 0.1%

Group	Count	%
White	10,094	84.3%
Two or more races	513	4.3%
Hispanic or Latino	502	4.2%
Asian	453	3.8%
Black or African American	233	1.9%
Other race	176	1.5%
American Indian / Alaska Native	7	0.1%

Household income

Under $10k 0.9%

$10k–$15k 1.5%

$15k–$25k 0.6%

$25k–$35k 4.9%

$35k–$50k 4.0%

$50k–$75k 10.8%

$75k–$100k 9.7%

$100k–$150k 18.0%

$150k–$200k 17.3%

$200k+ 32.2%

Range	% of households
Under $10k	0.9%
$10k–$15k	1.5%
$15k–$25k	0.6%
$25k–$35k	4.9%
$35k–$50k	4.0%
$50k–$75k	10.8%
$75k–$100k	9.7%
$100k–$150k	18.0%
$150k–$200k	17.3%
$200k+	32.2%
Median income	$146,042

Housing

Home values

Under $50k 0.8%

$50k–$100k 1.8%

$100k–$150k 0.6%

$150k–$200k 1.2%

$200k–$300k 2.5%

$300k–$500k 28.3%

$500k–$1M 58.8%

$1M+ 6.0%

Housing overview

Metric	Value
Median home value	$590,000
Median rent / month	$3,308
Owner occupied	97.7%
Renter occupied	2.3%
Vacant	4.0%
Single-family detached	81.5%
Large apartment buildings	0.3%
Mobile homes	0.0%
Median rooms	7.6
Avg household size (owned)	2.98

Year built

Era	%
2020 or later	1.4%
2010–2019	2.7%
2000–2009	27.3%
1990–1999	6.5%
1980–1989	12.1%
1970–1979	34.5%
1960–1969	5.7%
1950–1959	2.4%
1940–1949	0.5%
1939 or earlier	7.0%

Bedrooms

Size	% of units
No bedroom (studio)	0.5%
1 bedroom	2.7%
2 bedrooms	19.8%
3 bedrooms	27.1%
4 bedrooms	38.7%
5+ bedrooms	11.1%

Vehicles per household

Vehicles	% of households
No vehicle	3.9%
1 vehicle	28.1%
2 vehicles	39.1%
3 or more	28.9%

Heating fuel

Fuel type	%
Utility gas	37.1%
Electricity	8.0%
Propane / LP gas	1.8%
Fuel oil	52.0%
Wood	0.9%
Solar	0.1%

Households & families

Household type	Count	%
Married-couple family	3,016	78.6%
Cohabiting couple	59	1.5%
Male householder, no spouse	255	6.6%
Female householder, no spouse	509	13.3%
Households with children under 18	1,281	33.4%
Households with seniors (65+)	1,838	47.9%
Average household size	2.97

Marital status

Status	Male	Female
Never married	24.1%	22.7%
Married	68.1%	65.8%
Separated	0.4%	1.6%
Widowed	3.0%	4.3%
Divorced	4.5%	5.5%

Education

Less than 9th grade 2.0%

Some HS, no diploma 4.5%

HS graduate 21.2%

Some college, no degree 13.5%

Associate's degree 9.5%

Bachelor's degree 24.6%

Graduate / professional 24.6%

Metric	%
HS diploma or higher	93.4%
Bachelor's or higher	49.2%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	142	4.9%
Kindergarten	182	6.2%
Elementary school	1,311	44.8%
High school	748	25.6%
College / grad school	544	18.6%

Employment

Industry of employment

Education & healthcare 31.0%

Professional & management 14.1%

Finance & real estate 11.6%

Retail trade 7.4%

Construction 6.2%

Arts, food & hospitality 6.2%

Manufacturing 5.1%

Public administration 5.0%

Wholesale trade 3.7%

Transportation & utilities 3.7%

Other services 3.5%

Information 2.3%

Occupation

Category	%
Management, business & arts	57.4%
Service	9.6%
Sales & office	19.1%
Natural resources & construction	9.7%
Production & transportation	4.3%

Employment type

Type	%
Private sector	70.6%
Government	23.8%
Self-employed	5.0%
Unpaid family workers	0.5%

Commute

Method	%
Drive alone	75.5%
Carpool	7.0%
Public transit	2.8%
Walk	0.7%
Other means	0.9%
Avg commute (minutes)	33.5

Poverty

All people 1.8%

Under 18 years 0.0%

18 and over 2.3%

Married-couple families 1.2%

Female-led households 0.0%

Income support

Source	% of households
Social Security	46.2%
Retirement income	39.4%
Supplemental Security	2.8%
Cash public assistance	1.7%
Food stamps / SNAP	2.6%

Health indicators

Condition	%
High blood pressure	27.5%
High cholesterol	31.2%
Heart disease	5.0%
Stroke	2.2%
Asthma	9.2%
Arthritis	19.7%
Kidney disease	2.4%
Pulmonary disease	4.9%
Cancer	7.0%

Behavior / access	%
Binge drinking	18.0%
No physical activity	18.5%
Less than 7 hrs sleep	32.2%
Fair or poor health	8.8%
Poor mental health	12.3%
Poor physical health	7.6%
No health insurance	8.0%
Visited doctor (checkup)	78.9%
Visited dentist	74.0%
Cholesterol screening	93.4%
Teeth loss	8.1%

Veterans & disability

Veterans	Count	%
Civilian veterans	502	5.7%

Disability	%
Any disability	8.6%
Under 18	2.5%
18–64 years	4.7%
65 and over	21.6%

Health insurance coverage

Type	%
Private insurance	88.0%
Public insurance	31.6%
Uninsured under 19	0.8%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	10,998	95.8%
Spanish	221	2.0%
Other Indo-European	55	0.5%
Asian & Pacific Islander	121	1.1%
Other languages	45	0.4%

Place of birth & citizenship

Origin	Count	%
Native born (US)	10,609	92.4%
Born in same state	10,573	92.1%
Born in different state	9,750	85.0%
Foreign born	36	0.3%
Naturalized citizen	867	7.6%
Not a US citizen	742	85.6%

Ancestry

Ancestry	Count	%
Italian	2,778	24.2%
Arab	881	7.7%
French	758	6.6%
German	176	1.5%
English	113	1%

Ancestry	Count	%
Polish	65	0.6%
Norwegian	36	0.3%
Dutch	12	0.1%
Irish	4	0%

Technology access

Metric	% of households
Computer access	33.5%
Internet access	94.6%

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

Frequently asked questions

What is the ZIP code for Mount Sinai, NY?

Mount Sinai, NY has one ZIP code: 11766.

What is the main ZIP code for Mount Sinai, NY?

The primary ZIP code for Mount Sinai, NY is 11766. The city uses area code 631 or 516 for phone service.

What county is Mount Sinai, NY in?

Mount Sinai is located in Suffolk County, New York.

How many ZIP codes are in Mount Sinai, NY?

Mount Sinai, NY has 1 ZIP code.

What is the ZIP code for Mount Sinai Harbor and the waterfront residential areas along the Long Island Sound in Mount Sinai?

The Mount Sinai Harbor area and waterfront communities are located in ZIP code 11766, which encompasses the entire village of Mount Sinai.

What ZIP code should I use for mailing addresses to businesses and residences in the Mount Sinai village center?

All addresses within Mount Sinai village, including the central business and residential areas, use the ZIP code 11766.