11951 ZIP Code — Mastic Beach, NY

Suffolk County, New York

ZIP code 11951 is located in Mastic Beach, New York, within Suffolk County. It covers approximately 4.80 square miles and serves a population of 14,969 residents. This is a standard ZIP code in the Eastern (ET) timezone, served by area code 631.

About ZIP code 11951

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 $296,500. Owner-occupancy is high at 81%, well above the national average.

Median household income is $99,040. 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. An above-average commute of 37 minutes suggests many residents work outside the immediate area.

College attainment at 19% is below the national average, consistent with a trades and production-oriented local economy.

Overall, ZIP code 11951 reflects a community defined by a trades-oriented workforce, high homeownership, and a significant Social Security-dependent population.

14,969

population

4.80

sq mi land

Standard

ZIP type

Eastern (ET)

timezone

11951 ZIP code map

Cities in ZIP code 11951

Below are the cities the US Postal Service accepts for ZIP code 11951. Using any city not on this list may result in mail delivery delays.

City	Status
Mastic Beach	Acceptable
Mastic Beach	Preferred

Nearby ZIP codes

11955 Moriches (2.8 mi) 11967 Shirley (3 mi) 11950 Mastic (3.1 mi) 11934 Center Moriches (3.5 mi) 11719 Brookhaven (3.8 mi) 11772 Patchogue (3.8 mi) 11772 Patchogue (3.8 mi) 11940 East Moriches (5.2 mi) 11713 Bellport (5.5 mi) 11980 Yaphank (6.2 mi) 11941 Eastport (7.5 mi) 11949 Manorville (7.5 mi)

Demographics updated 05/2026

Population
Total population	14,969
Population density	3,119 / sq mi
State FIPS	36
County FIPS	103

Geography
Land area	4.80 sq mi
Water area	1.09 sq mi
Latitude	40.7657
Longitude	-72.8379
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	31.5%	22.6%	37.0%
$50k – $100k	31.6%	24.7%	27.0%
$100k – $200k	31.5%	34.6%	24.4%
Over $200k	5.4%	18.0%	11.5%

Demographics & statistics

14,969

Population

3,119

People per sq mi

38.4

Median age

$99,040

Median household income

$36,167

Per capita income

$296,500

Median home value

$2,068

Median monthly rent

80.5%

Home ownership

17.4%

Poverty rate

6.2%

Unemployment

4,395

Housing units

19.0%

Bachelor's or higher

Age distribution

Male Female

530

Under 5

694

412

5–9

540

584

10–14

765

399

15–19

523

332

20–24

434

769

25–34

1,008

1,026

35–44

1,344

764

45–54

1,001

516

55–59

677

399

60–64

524

405

65–74

531

201

75–84

263

142

85+

186

← Male

Female →

Age summary

Group	Count	%
Under 18	4,149	27.7%
18 and over	10,820	72.3%
65 and over	1,728	11.5%
Median age	38.4 years

Race & ethnicity

White 76.1%

Black or African American 8.1%

Two or more races 7.4%

Hispanic or Latino 4.9%

Other race 1.9%

Asian 1.6%

Group	Count	%
White	11,978	76.1%
Black or African American	1,274	8.1%
Two or more races	1,158	7.4%
Hispanic or Latino	778	4.9%
Other race	298	1.9%
Asian	258	1.6%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	31.5%	22.6%	37.0%
$50k – $100k	31.6%	24.7%	27.0%
$100k – $200k	31.5%	34.6%	24.4%
Over $200k	5.4%	18.0%	11.5%

Under $10k 8.3%

$10k–$15k 1.2%

$15k–$25k 7.7%

$25k–$35k 7.1%

$35k–$50k 4.4%

$50k–$75k 9.7%

$75k–$100k 12.1%

$100k–$150k 30.9%

$150k–$200k 7.6%

$200k+ 11.1%

Range	% of households
Under $10k	8.3%
$10k–$15k	1.2%
$15k–$25k	7.7%
$25k–$35k	7.1%
$35k–$50k	4.4%
$50k–$75k	9.7%
$75k–$100k	12.1%
$100k–$150k	30.9%
$150k–$200k	7.6%
$200k+	11.1%
Median income	$99,040

Housing

Home values

$100k–$150k 7.3%

$150k–$200k 6.7%

$200k–$300k 37.4%

$300k–$500k 45.7%

$500k–$1M 2.9%

Housing overview

Metric	Value
Median home value	$296,500
Median rent / month	$2,068
Owner occupied	80.5%
Renter occupied	19.5%
Vacant	9.7%
Single-family detached	94.0%
Large apartment buildings	0.4%
Mobile homes	0.0%
Median rooms	5.9
Avg household size (owned)	2.99

Year built

Era	%
2020 or later	0.2%
2010–2019	2.6%
2000–2009	5.5%
1990–1999	6.8%
1980–1989	12.9%
1970–1979	26.3%
1960–1969	15.2%
1950–1959	14.3%
1940–1949	9.7%
1939 or earlier	6.5%

Bedrooms

Size	% of units
No bedroom (studio)	0.4%
1 bedroom	3.8%
2 bedrooms	24.9%
3 bedrooms	54.7%
4 bedrooms	14.2%
5+ bedrooms	1.9%

Vehicles per household

Vehicles	% of households
No vehicle	7.5%
1 vehicle	23.6%
2 vehicles	46.5%
3 or more	22.3%

Heating fuel

Fuel type	%
Utility gas	4.2%
Electricity	4.5%
Propane / LP gas	2.7%
Fuel oil	86.5%
Wood	0.6%
No fuel used	0.5%

Households & families

Household type	Count	%
Married-couple family	2,556	53.0%
Cohabiting couple	517	10.7%
Male householder, no spouse	551	11.4%
Female householder, no spouse	1,195	24.8%
Households with children under 18	1,725	35.8%
Households with seniors (65+)	1,445	30.0%
Average household size	3.10

Marital status

Status	Male	Female
Never married	38.9%	34.0%
Married	52.4%	45.2%
Separated	1.2%	0.7%
Widowed	2.9%	12.0%
Divorced	4.6%	8.2%

Education

Less than 9th grade 3.5%

Some HS, no diploma 9.2%

HS graduate 36.8%

Some college, no degree 16.9%

Associate's degree 14.7%

Bachelor's degree 11.4%

Graduate / professional 7.5%

Metric	%
HS diploma or higher	87.3%
Bachelor's or higher	19.0%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	157	4.4%
Kindergarten	13	0.4%
Elementary school	1,923	53.8%
High school	845	23.6%
College / grad school	636	17.8%

Employment

Industry of employment

Education & healthcare 28.5%

Professional & management 12.6%

Retail trade 12.2%

Construction 9.8%

Manufacturing 8.5%

Transportation & utilities 6.6%

Arts, food & hospitality 5.6%

Finance & real estate 4.5%

Other services 4.4%

Public administration 3.1%

Information 2.5%

Wholesale trade 1.7%

Agriculture & mining 0.1%

Occupation

Category	%
Management, business & arts	32.2%
Service	19.8%
Sales & office	22.2%
Natural resources & construction	13.9%
Production & transportation	11.9%

Employment type

Type	%
Private sector	84.0%
Government	13.1%
Self-employed	2.8%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	81.4%
Carpool	8.5%
Public transit	1.3%
Walk	1.1%
Work from home	6.0%
Other means	1.8%
Avg commute (minutes)	36.8

Poverty

All people 17.4%

Under 18 years 27.0%

18 and over 13.8%

Married-couple families 3.9%

Female-led households 45.5%

Income support

Source	% of households
Social Security	30.8%
Retirement income	21.4%
Supplemental Security	2.6%
Cash public assistance	4.1%
Food stamps / SNAP	12.5%

Health indicators

Condition	%
Obesity	30.3%
High blood pressure	27.3%
High cholesterol	28.2%
Diabetes	8.1%
Heart disease	4.9%
Stroke	2.4%
Asthma	10.4%
Arthritis	18.5%
Kidney disease	2.4%
Pulmonary disease	6.2%
Cancer	5.1%

Behavior / access	%
Smoking	19.6%
Binge drinking	19.1%
No physical activity	25.8%
Less than 7 hrs sleep	37.4%
Depression	18.9%
Fair or poor health	13.0%
Poor mental health	15.8%
Poor physical health	9.8%
No health insurance	14.1%
Visited doctor (checkup)	76.4%
Visited dentist	61.7%
Cholesterol screening	89.3%
Teeth loss	14.8%

Veterans & disability

Veterans	Count	%
Civilian veterans	415	3.8%

Disability	%
Any disability	11.3%
Under 18	11.4%
18–64 years	9.7%
65 and over	19.2%

Health insurance coverage

Type	%
Private insurance	78.6%
Public insurance	31.0%
No insurance	2.7%
Uninsured under 19	0.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	13,745	91.8%
Spanish	654	4.8%
Other Indo-European	428	3.1%
Asian & Pacific Islander	153	1.1%
Other languages	58	0.4%

Place of birth & citizenship

Origin	Count	%
Native born (US)	13,437	89.8%
Born in same state	13,206	88.2%
Born in different state	12,557	83.9%
Foreign born	231	1.5%
Naturalized citizen	1,532	10.2%
Not a US citizen	572	37.3%

Ancestry

Ancestry	Count	%
Italian	2,688	18%
Arab	708	4.7%
French	389	2.6%
Polish	131	0.9%

Ancestry	Count	%
English	95	0.6%
Norwegian	64	0.4%
Irish	20	0.1%
German	8	0.1%

Technology access

Metric	% of households
Computer access	32.2%
Internet access	95.4%

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

Frequently asked questions about ZIP code 11951

What city is ZIP code 11951 in?

ZIP code 11951 is primarily assigned to Mastic Beach, New York.

What county is ZIP code 11951 in?

ZIP code 11951 falls within Suffolk County, New York.

What is the poverty rate in ZIP code 11951?

17% of residents in ZIP code 11951 live below the poverty line, above the national average.

Is ZIP code 11951 mostly owner-occupied?

81% of occupied units in ZIP code 11951 are owner-occupied, well above the national average.

What is the population of ZIP code 11951?

ZIP code 11951 has an estimated population of 14,969 residents, with a density of 3,119 people per square mile.

What is the median household income in ZIP code 11951?

The median household income in ZIP code 11951 is $99,040, above the national median of ~$75,000.

What timezone is ZIP code 11951 in?

ZIP code 11951 observes the EST timezone.