11964 ZIP Code — Shelter Island, NY

Suffolk County, New York

ZIP code 11964 is located in Shelter Island, New York, within Suffolk County. It covers approximately 9.38 square miles and serves a population of 3,129 residents. This is a standard ZIP code in the Eastern (ET) timezone, served by area code 631.

About ZIP code 11964

The housing stock consists of predominantly single-family detached homes. Most homes were built in the pre-1940, giving the area an established character. Median home value is $934,900. Owner-occupancy is high at 89%, well above the national average.

The gap between median ($98,409) 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. 36% of households receive Social Security income, suggesting a notable retiree or disability population.

The dominant occupation class is management, business, and professional, with professional and management as the leading industry. The average commute of 24 minutes is near the national average. Remote work is prevalent — 30% of workers work from home.

Educational attainment is high — 57% of residents hold a bachelor's degree or higher, well above the national average of 33%.

Overall, ZIP code 11964 reflects a community defined by a highly educated population, high homeownership, a high rate of remote workers, and a significant Social Security-dependent population.

3,129

population

9.38

sq mi land

Standard

ZIP type

Eastern (ET)

timezone

11964 ZIP code map

Cities in ZIP code 11964

Below are the cities the US Postal Service accepts for ZIP code 11964. Using any city not on this list may result in mail delivery delays.

City	Status
Shelter Island	Acceptable

Demographics updated 06/2026

Population
Total population	3,129
Population density	334 / sq mi
State FIPS	36
County FIPS	103

Geography
Land area	9.38 sq mi
Water area	5.99 sq mi
Latitude	41.0512
Longitude	-72.3132
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	18.5%	22.6%	37.0%
$50k – $100k	32.0%	24.7%	27.0%
$100k – $200k	35.2%	34.6%	24.4%
Over $200k	14.3%	18.0%	11.5%

Demographics & statistics

3,129

Population

334

People per sq mi

42.3

Median age

$98,409

Median household income

$49,161

Per capita income

$934,900

Median home value

Median monthly rent

88.5%

Home ownership

3.6%

Poverty rate

5.8%

Unemployment

2,493

Housing units

56.7%

Bachelor's or higher

Age distribution

Male Female

181

Under 5

198

5–9

10–14

15–19

100

20–24

25–34

301

35–44

327

134

45–54

147

55–59

60–64

269

65–74

292

75–84

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	770	24.6%
18 and over	2,359	75.4%
65 and over	914	29.2%
Median age	42.3 years

Race & ethnicity

White 60%

American Indian / Alaska Native 17.3%

Hispanic or Latino 7.6%

Other race 7.6%

Asian 6.6%

Black or African American 0.9%

Group	Count	%
White	2,032	60%
American Indian / Alaska Native	586	17.3%
Hispanic or Latino	256	7.6%
Other race	256	7.6%
Asian	224	6.6%
Black or African American	31	0.9%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	18.5%	22.6%	37.0%
$50k – $100k	32.0%	24.7%	27.0%
$100k – $200k	35.2%	34.6%	24.4%
Over $200k	14.3%	18.0%	11.5%

Under $10k 0.7%

$10k–$15k 6.8%

$25k–$35k 1.4%

$35k–$50k 11.5%

$50k–$75k 15.8%

$75k–$100k 17.3%

$100k–$150k 12.3%

$150k–$200k 9.4%

$200k+ 24.8%

Range	% of households
Under $10k	0.7%
$10k–$15k	6.8%
$25k–$35k	1.4%
$35k–$50k	11.5%
$50k–$75k	15.8%
$75k–$100k	17.3%
$100k–$150k	12.3%
$150k–$200k	9.4%
$200k+	24.8%
Median income	$98,409

Housing

Home values

$50k–$100k 0.7%

$100k–$150k 6.1%

$150k–$200k 5.3%

$200k–$300k 1.6%

$500k–$1M 48.2%

$1M+ 38.1%

Housing overview

Metric	Value
Median home value	$934,900
Median rent / month	$0
Owner occupied	88.5%
Renter occupied	11.5%
Vacant	53.4%
Single-family detached	91.2%
Large apartment buildings	0.0%
Mobile homes	0.0%
Median rooms	6.7
Avg household size (owned)	2.33

Year built

Era	%
2020 or later	0.0%
2010–2019	2.1%
2000–2009	9.3%
1990–1999	13.1%
1980–1989	16.0%
1970–1979	14.9%
1960–1969	16.9%
1950–1959	8.9%
1940–1949	0.0%
1939 or earlier	18.8%

Bedrooms

Size	% of units
No bedroom (studio)	1.0%
1 bedroom	4.9%
2 bedrooms	14.7%
3 bedrooms	32.8%
4 bedrooms	40.8%
5+ bedrooms	5.7%

Vehicles per household

Vehicles	% of households
No vehicle	0.0%
1 vehicle	27.5%
2 vehicles	45.7%
3 or more	26.8%

Heating fuel

Fuel type	%
Utility gas	10.1%
Electricity	13.3%
Propane / LP gas	12.4%
Fuel oil	64.3%

Households & families

Household type	Count	%
Married-couple family	738	60.1%
Cohabiting couple	22	1.8%
Male householder, no spouse	268	21.8%
Female householder, no spouse	200	16.3%
Households with children under 18	303	24.7%
Households with seniors (65+)	659	53.7%
Average household size	2.52

Marital status

Status	Male	Female
Never married	30.3%	28.9%
Married	58.8%	59.9%
Separated	0.0%	0.0%
Widowed	0.0%	0.7%
Divorced	10.8%	10.5%

Education

Less than 9th grade 0.0%

Some HS, no diploma 13.8%

HS graduate 13.4%

Some college, no degree 13.2%

Associate's degree 2.8%

Bachelor's degree 26.4%

Graduate / professional 30.3%

Metric	%
HS diploma or higher	86.2%
Bachelor's or higher	56.7%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	91	13.5%
Kindergarten	95	14.1%
Elementary school	308	45.8%
High school	83	12.4%
College / grad school	95	14.1%

Employment

Industry of employment

Professional & management 25.7%

Transportation & utilities 20.6%

Education & healthcare 15.1%

Finance & real estate 13.0%

Public administration 7.4%

Construction 6.7%

Arts, food & hospitality 6.0%

Wholesale trade 3.1%

Retail trade 2.3%

Occupation

Category	%
Management, business & arts	53.5%
Service	0.0%
Sales & office	9.2%
Natural resources & construction	12.7%
Production & transportation	24.7%

Employment type

Type	%
Private sector	73.0%
Government	13.8%
Self-employed	13.2%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	56.3%
Carpool	6.7%
Public transit	7.1%
Walk	0.4%
Work from home	29.6%
Other means	0.0%
Avg commute (minutes)	24.4

Poverty

All people 3.6%

Under 18 years 0.0%

18 and over 4.8%

Married-couple families 0.0%

Female-led households 0.0%

Income support

Source	% of households
Social Security	36.3%
Retirement income	24.0%
Supplemental Security	1.8%
Cash public assistance	0.0%
Food stamps / SNAP	0.0%

Health indicators

Condition	%
Obesity	24.8%
High blood pressure	32.8%
High cholesterol	35.4%
Diabetes	8.8%
Heart disease	6.8%
Stroke	2.8%
Asthma	8.6%
Arthritis	24.2%
Kidney disease	3.0%
Pulmonary disease	5.5%
Cancer	9.6%

Behavior / access	%
Smoking	10.2%
Binge drinking	15.5%
No physical activity	18.5%
Less than 7 hrs sleep	30.1%
Depression	15.1%
Fair or poor health	9.0%
Poor mental health	10.4%
Poor physical health	7.9%
No health insurance	7.0%
Visited doctor (checkup)	81.9%
Visited dentist	76.4%
Cholesterol screening	95.6%
Teeth loss	7.3%

Veterans & disability

Veterans	Count	%
Civilian veterans	181	7.7%

Disability	%
Any disability	5.6%
Under 18	0.0%
18–64 years	7.4%
65 and over	7.5%

Health insurance coverage

Type	%
Private insurance	69.2%
Public insurance	47.4%
No insurance	7.6%
Uninsured under 19	0.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	2,750	87.9%
Spanish	265	9.6%
Other Indo-European	154	5.6%
Asian & Pacific Islander	111	4.0%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	2,789	89.1%
Born in same state	2,784	89.0%
Born in different state	1,930	61.7%
Foreign born	5	0.2%
Naturalized citizen	340	10.9%
Not a US citizen	181	53.2%

Ancestry

Ancestry	Count	%
Italian	664	21.2%
French	193	6.2%

Ancestry	Count	%
Polish	8	0.3%

Technology access

Metric	% of households
Computer access	39.2%
Internet access	99.3%

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

Frequently asked questions about ZIP code 11964

What city is ZIP code 11964 in?

ZIP code 11964 is primarily assigned to Shelter Island, New York.

What county is ZIP code 11964 in?

ZIP code 11964 falls within Suffolk County, New York.

Does ZIP code 11964 have an older population?

29% of residents in ZIP code 11964 are 65 or older, above the national average of ~17%.

How educated is the population of ZIP code 11964?

57% of residents hold a bachelor's degree or higher — well above the national average of ~33%, reflecting a highly educated population.

Is ZIP code 11964 mostly owner-occupied?

89% of occupied units in ZIP code 11964 are owner-occupied, well above the national average.

Does ZIP code 11964 have a large retiree population?

36% of households in ZIP code 11964 receive Social Security income, suggesting a significant retiree or disability population.

What timezone is ZIP code 11964 in?

ZIP code 11964 observes the EST timezone.