11971 ZIP Code — Southold, NY

Suffolk County, New York

ZIP code 11971 is located in Southold, New York, within Suffolk County. It covers approximately 10.96 square miles and serves a population of 6,286 residents. This is a standard ZIP code in the Eastern (ET) timezone, served by area code 631.

About ZIP code 11971

The housing stock consists of predominantly single-family detached homes. Most homes were built in the 1970s, giving the area an established character. Median home value is $695,100. Owner-occupancy is high at 81%, well above the national average.

The gap between median ($104,720) 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. 41% 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 26 minutes is near the national average.

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

Overall, ZIP code 11971 reflects a community defined by high homeownership and a significant Social Security-dependent population.

6,286

population

10.96

sq mi land

Standard

ZIP type

Eastern (ET)

timezone

11971 ZIP code map

Cities in ZIP code 11971

Below are the cities the US Postal Service accepts for ZIP code 11971. Using any city not on this list may result in mail delivery delays.

City	Status
Southold	Preferred

Nearby ZIP codes

11958 Peconic (2.6 mi) 11944 Greenport (3.9 mi) 11935 Cutchogue (5.2 mi) 11939 East Marion (6.6 mi) 11952 Mattituck (7.6 mi) 11963 Sag Harbor (8.5 mi) 11948 Laurel (9.6 mi) 11976 Water Mill (10 mi) 11968 Southampton (10.7 mi) 11957 Orient (11.4 mi) 11946 Hampton Bays (13.5 mi) 11937 East Hampton (14.5 mi)

Demographics updated 06/2026

Population
Total population	6,286
Population density	574 / sq mi
State FIPS	36
County FIPS	103

Geography
Land area	10.96 sq mi
Water area	4.12 sq mi
Latitude	41.0619
Longitude	-72.4247
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	22.1%	22.6%	37.0%
$50k – $100k	35.5%	24.7%	27.0%
$100k – $200k	26.3%	34.6%	24.4%
Over $200k	16.1%	18.0%	11.5%

Demographics & statistics

6,286

Population

574

People per sq mi

49.4

Median age

$104,720

Median household income

$72,726

Per capita income

$695,100

Median home value

$2,157

Median monthly rent

81.4%

Home ownership

3.9%

Poverty rate

8.7%

Unemployment

3,491

Housing units

47.7%

Bachelor's or higher

Age distribution

Male Female

189

Under 5

176

256

5–9

238

265

10–14

246

15–19

20–24

301

25–34

279

359

35–44

334

305

45–54

283

303

55–59

282

349

60–64

324

519

65–74

483

201

75–84

187

103

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	1,484	23.6%
18 and over	4,802	76.4%
65 and over	1,588	25.3%
Median age	49.4 years

Race & ethnicity

White 76.4%

Hispanic or Latino 9.9%

Other race 5.6%

Two or more races 4.3%

Asian 3.3%

Black or African American 0.4%

Group	Count	%
White	5,334	76.4%
Hispanic or Latino	693	9.9%
Other race	393	5.6%
Two or more races	300	4.3%
Asian	232	3.3%
Black or African American	27	0.4%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	22.1%	22.6%	37.0%
$50k – $100k	35.5%	24.7%	27.0%
$100k – $200k	26.3%	34.6%	24.4%
Over $200k	16.1%	18.0%	11.5%

Under $10k 1.7%

$10k–$15k 3.3%

$15k–$25k 3.3%

$25k–$35k 3.5%

$35k–$50k 5.6%

$50k–$75k 18.4%

$75k–$100k 10.4%

$100k–$150k 10.7%

$150k–$200k 14.0%

$200k+ 29.2%

Range	% of households
Under $10k	1.7%
$10k–$15k	3.3%
$15k–$25k	3.3%
$25k–$35k	3.5%
$35k–$50k	5.6%
$50k–$75k	18.4%
$75k–$100k	10.4%
$100k–$150k	10.7%
$150k–$200k	14.0%
$200k+	29.2%
Median income	$104,720

Housing

Home values

Under $50k 1.9%

$50k–$100k 1.3%

$300k–$500k 12.2%

$500k–$1M 63.2%

$1M+ 21.3%

Housing overview

Metric	Value
Median home value	$695,100
Median rent / month	$2,157
Owner occupied	81.4%
Renter occupied	18.6%
Vacant	36.5%
Single-family detached	91.9%
Large apartment buildings	1.6%
Mobile homes	0.0%
Median rooms	6.2
Avg household size (owned)	2.44

Year built

Era	%
2020 or later	0.1%
2010–2019	3.5%
2000–2009	7.3%
1990–1999	9.1%
1980–1989	14.2%
1970–1979	20.0%
1960–1969	18.6%
1950–1959	5.6%
1940–1949	6.6%
1939 or earlier	14.9%

Bedrooms

Size	% of units
No bedroom (studio)	0.2%
1 bedroom	7.2%
2 bedrooms	11.8%
3 bedrooms	47.6%
4 bedrooms	25.6%
5+ bedrooms	7.6%

Vehicles per household

Vehicles	% of households
No vehicle	9.4%
1 vehicle	31.8%
2 vehicles	30.7%
3 or more	28.1%

Heating fuel

Fuel type	%
Utility gas	22.5%
Electricity	4.5%
Propane / LP gas	6.9%
Fuel oil	57.7%
Wood	2.8%
No fuel used	1.9%

Households & families

Household type	Count	%
Married-couple family	1,508	60.0%
Cohabiting couple	46	1.8%
Male householder, no spouse	415	16.5%
Female householder, no spouse	546	21.7%
Households with children under 18	658	26.2%
Households with seniors (65+)	1,158	46.0%
Average household size	2.48

Marital status

Status	Male	Female
Never married	24.7%	13.8%
Married	63.7%	71.9%
Separated	2.5%	0.5%
Widowed	3.5%	11.7%
Divorced	5.6%	2.0%

Education

Less than 9th grade 2.8%

Some HS, no diploma 6.4%

HS graduate 22.9%

Some college, no degree 13.5%

Associate's degree 6.6%

Bachelor's degree 25.3%

Graduate / professional 22.4%

Metric	%
HS diploma or higher	90.8%
Bachelor's or higher	47.7%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	86	6.6%
Kindergarten	52	4.0%
Elementary school	913	70.6%
High school	133	10.3%
College / grad school	110	8.5%

Employment

Industry of employment

Education & healthcare 20.2%

Retail trade 11.0%

Professional & management 10.7%

Construction 10.0%

Finance & real estate 8.1%

Arts, food & hospitality 8.1%

Manufacturing 6.9%

Public administration 6.6%

Wholesale trade 6.1%

Transportation & utilities 4.8%

Information 3.7%

Other services 2.1%

Agriculture & mining 1.6%

Occupation

Category	%
Management, business & arts	44.0%
Service	11.1%
Sales & office	21.6%
Natural resources & construction	10.7%
Production & transportation	12.6%

Employment type

Type	%
Private sector	75.2%
Government	14.1%
Self-employed	9.5%
Unpaid family workers	1.2%

Commute

Method	%
Drive alone	72.3%
Carpool	8.3%
Public transit	7.9%
Walk	0.8%
Work from home	9.4%
Other means	1.4%
Avg commute (minutes)	26.1

Poverty

All people 3.9%

Under 18 years 0.0%

18 and over 5.0%

Married-couple families 0.0%

Female-led households 0.0%

Income support

Source	% of households
Social Security	41.1%
Retirement income	28.7%
Supplemental Security	3.9%
Cash public assistance	1.9%
Food stamps / SNAP	6.9%

Health indicators

Condition	%
Obesity	26.8%
High blood pressure	34.6%
High cholesterol	37.1%
Diabetes	9.9%
Heart disease	7.6%
Stroke	3.3%
Asthma	9.3%
Arthritis	25.9%
Kidney disease	3.4%
Pulmonary disease	6.9%
Cancer	9.4%

Behavior / access	%
Smoking	12.5%
Binge drinking	15.0%
No physical activity	22.2%
Less than 7 hrs sleep	31.6%
Depression	16.2%
Fair or poor health	11.6%
Poor mental health	11.7%
Poor physical health	9.5%
No health insurance	8.9%
Visited doctor (checkup)	81.8%
Visited dentist	71.2%
Cholesterol screening	94.4%
Teeth loss	10.4%

Veterans & disability

Veterans	Count	%
Civilian veterans	217	4.5%

Disability	%
Any disability	11.6%
Under 18	3.9%
18–64 years	5.0%
65 and over	32.1%

Health insurance coverage

Type	%
Private insurance	71.3%
Public insurance	33.9%
No insurance	12.5%
Uninsured under 19	18.1%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	5,921	94.2%
Spanish	415	7.0%
Other Indo-European	255	4.3%
Asian & Pacific Islander	160	2.7%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	5,413	86.1%
Born in same state	5,290	84.2%
Born in different state	4,624	73.6%
Foreign born	123	2.0%
Naturalized citizen	873	13.9%
Not a US citizen	564	64.6%

Ancestry

Ancestry	Count	%
Italian	1,046	16.6%
Arab	837	13.3%
French	513	8.2%
Polish	50	0.8%
Dutch	24	0.4%

Ancestry	Count	%
Norwegian	20	0.3%
Irish	18	0.3%
English	18	0.3%
German	11	0.2%

Technology access

Metric	% of households
Computer access	40.0%
Internet access	95.8%

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

Frequently asked questions about ZIP code 11971

What city is ZIP code 11971 in?

ZIP code 11971 is primarily assigned to Southold, New York.

What county is ZIP code 11971 in?

ZIP code 11971 falls within Suffolk County, New York.

Does ZIP code 11971 have an older population?

25% of residents in ZIP code 11971 are 65 or older, above the national average of ~17%.

Is ZIP code 11971 mostly owner-occupied?

81% of occupied units in ZIP code 11971 are owner-occupied, well above the national average.

Does ZIP code 11971 have a large retiree population?

41% of households in ZIP code 11971 receive Social Security income, suggesting a significant retiree or disability population.

How educated is the population of ZIP code 11971?

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

What timezone is ZIP code 11971 in?

ZIP code 11971 observes the EST timezone.