11720 ZIP Code — Centereach, NY

Suffolk County, New York

ZIP code 11720 is located in Centereach, New York, within Suffolk County. It covers approximately 8.23 square miles and serves a population of 29,193 residents. This is a standard ZIP code in the Eastern (ET) timezone, served by area code 631.

About ZIP code 11720

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 $438,500. Owner-occupancy is high at 83%, well above the national average.

Median household income is $123,603. The poverty rate of 5% is below the national average. 35% 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 32 minutes is near the national average.

Educational attainment is near the national average, with 35% of residents holding a bachelor's degree or higher.

Overall, ZIP code 11720 reflects a community defined by high homeownership and a significant Social Security-dependent population.

29,193

population

8.23

sq mi land

Standard

ZIP type

Eastern (ET)

timezone

11720 ZIP code map

Cities in ZIP code 11720

Below are the cities the US Postal Service accepts for ZIP code 11720. Using any city not on this list may result in mail delivery delays.

City	Status
Centereach	Acceptable
Centereach	Preferred

Nearby ZIP codes

11755 Lake Grove (2.1 mi) 11784 Selden (2.5 mi) 11790 Stony Brook (3.2 mi) 11738 Farmingville (3.3 mi) 11794 Stony Brook (3.5 mi) 11776 Port Jefferson Station (3.6 mi) 11767 Nesconset (3.7 mi) 11727 Coram (4.2 mi) 00501 Holtsville (4.2 mi) 11779 Ronkonkoma (4.2 mi) 11733 East Setauket (4.4 mi) 11742 Holtsville (4.6 mi)

Demographics updated 06/2026

Population
Total population	29,193
Population density	3,547 / sq mi
State FIPS	36
County FIPS	103

Geography
Land area	8.23 sq mi
Water area	0.00 sq mi
Latitude	40.8711
Longitude	-73.0838
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	20.1%	22.6%	37.0%
$50k – $100k	24.1%	24.7%	27.0%
$100k – $200k	41.8%	34.6%	24.4%
Over $200k	14.1%	18.0%	11.5%

Demographics & statistics

29,193

Population

3,547

People per sq mi

38.1

Median age

$123,603

Median household income

$46,674

Per capita income

$438,500

Median home value

$2,299

Median monthly rent

82.5%

Home ownership

5.4%

Poverty rate

5.9%

Unemployment

7,948

Housing units

35.4%

Bachelor's or higher

Age distribution

Male Female

793

Under 5

801

561

5–9

566

1,089

10–14

1,098

1,297

15–19

1,309

1,011

20–24

1,021

1,878

25–34

1,896

1,742

35–44

1,758

2,090

45–54

2,108

1,081

55–59

1,091

919

60–64

928

1,037

65–74

1,047

691

75–84

698

340

85+

343

← Male

Female →

Age summary

Group	Count	%
Under 18	6,664	22.8%
18 and over	22,529	77.2%
65 and over	4,156	14.2%
Median age	38.1 years

Race & ethnicity

White 70.1%

Hispanic or Latino 7.6%

Asian 6.4%

Two or more races 6.2%

Black or African American 5.2%

Other race 4.2%

American Indian / Alaska Native 0.3%

Group	Count	%
White	22,148	70.1%
Hispanic or Latino	2,409	7.6%
Asian	2,014	6.4%
Two or more races	1,970	6.2%
Black or African American	1,645	5.2%
Other race	1,317	4.2%
American Indian / Alaska Native	92	0.3%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	20.1%	22.6%	37.0%
$50k – $100k	24.1%	24.7%	27.0%
$100k – $200k	41.8%	34.6%	24.4%
Over $200k	14.1%	18.0%	11.5%

Under $10k 1.8%

$10k–$15k 0.5%

$15k–$25k 3.3%

$25k–$35k 3.1%

$35k–$50k 4.4%

$50k–$75k 13.3%

$75k–$100k 11.7%

$100k–$150k 24.8%

$150k–$200k 14.0%

$200k+ 23.0%

Range	% of households
Under $10k	1.8%
$10k–$15k	0.5%
$15k–$25k	3.3%
$25k–$35k	3.1%
$35k–$50k	4.4%
$50k–$75k	13.3%
$75k–$100k	11.7%
$100k–$150k	24.8%
$150k–$200k	14.0%
$200k+	23.0%
Median income	$123,603

Housing

Home values

Under $50k 1.2%

$100k–$150k 1.5%

$150k–$200k 0.5%

$200k–$300k 9.4%

$300k–$500k 59.5%

$500k–$1M 27.1%

$1M+ 0.8%

Housing overview

Metric	Value
Median home value	$438,500
Median rent / month	$2,299
Owner occupied	82.5%
Renter occupied	17.5%
Vacant	5.9%
Single-family detached	88.9%
Large apartment buildings	4.2%
Mobile homes	0.6%
Median rooms	6.7
Avg household size (owned)	3.37

Year built

Era	%
2020 or later	0.0%
2010–2019	1.7%
2000–2009	9.1%
1990–1999	7.6%
1980–1989	7.6%
1970–1979	21.6%
1960–1969	26.5%
1950–1959	17.8%
1940–1949	4.2%
1939 or earlier	3.8%

Bedrooms

Size	% of units
No bedroom (studio)	2.5%
1 bedroom	7.0%
2 bedrooms	10.6%
3 bedrooms	40.1%
4 bedrooms	32.6%
5+ bedrooms	7.2%

Vehicles per household

Vehicles	% of households
No vehicle	4.9%
1 vehicle	22.3%
2 vehicles	39.3%
3 or more	33.5%

Heating fuel

Fuel type	%
Utility gas	48.9%
Electricity	8.5%
Propane / LP gas	1.2%
Fuel oil	40.0%
Wood	0.2%
Solar	0.6%
No fuel used	0.3%

Households & families

Household type	Count	%
Married-couple family	5,659	63.2%
Cohabiting couple	464	5.2%
Male householder, no spouse	995	11.1%
Female householder, no spouse	1,838	20.5%
Households with children under 18	3,361	37.5%
Households with seniors (65+)	2,991	33.4%
Average household size	3.24

Marital status

Status	Male	Female
Never married	36.8%	35.4%
Married	54.7%	50.2%
Separated	0.8%	1.2%
Widowed	2.9%	7.2%
Divorced	4.8%	6.0%

Education

Less than 9th grade 2.8%

Some HS, no diploma 5.3%

HS graduate 28.1%

Some college, no degree 17.6%

Associate's degree 10.7%

Bachelor's degree 17.9%

Graduate / professional 17.5%

Metric	%
HS diploma or higher	91.9%
Bachelor's or higher	35.4%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	521	6.4%
Kindergarten	243	3.0%
Elementary school	2,776	34.3%
High school	2,134	26.4%
College / grad school	2,414	29.8%

Employment

Industry of employment

Education & healthcare 30.4%

Retail trade 12.5%

Professional & management 11.5%

Construction 8.4%

Public administration 7.5%

Manufacturing 7.0%

Arts, food & hospitality 5.9%

Finance & real estate 5.0%

Transportation & utilities 4.8%

Other services 3.2%

Wholesale trade 1.9%

Information 1.7%

Agriculture & mining 0.1%

Occupation

Category	%
Management, business & arts	43.5%
Service	18.6%
Sales & office	20.8%
Natural resources & construction	8.4%
Production & transportation	8.7%

Employment type

Type	%
Private sector	71.8%
Government	25.4%
Self-employed	2.8%
Unpaid family workers	0.1%

Commute

Method	%
Drive alone	77.6%
Carpool	8.0%
Public transit	3.0%
Walk	0.7%
Work from home	8.6%
Other means	2.0%
Avg commute (minutes)	31.6

Poverty

All people 5.4%

Under 18 years 5.8%

18 and over 5.2%

Married-couple families 1.5%

Female-led households 13.3%

Income support

Source	% of households
Social Security	34.7%
Retirement income	28.5%
Supplemental Security	4.2%
Cash public assistance	2.5%
Food stamps / SNAP	5.2%

Health indicators

Condition	%
Obesity	26.4%
High blood pressure	26.0%
High cholesterol	28.7%
Diabetes	7.4%
Heart disease	4.7%
Stroke	2.2%
Asthma	9.3%
Arthritis	18.0%
Kidney disease	2.3%
Pulmonary disease	5.0%
Cancer	5.9%

Behavior / access	%
Smoking	14.4%
Binge drinking	19.1%
No physical activity	21.0%
Less than 7 hrs sleep	34.3%
Depression	17.0%
Fair or poor health	9.7%
Poor mental health	13.5%
Poor physical health	8.0%
No health insurance	10.5%
Visited doctor (checkup)	77.2%
Visited dentist	69.5%
Cholesterol screening	91.3%
Teeth loss	10.1%

Veterans & disability

Veterans	Count	%
Civilian veterans	1,274	5.7%

Disability	%
Any disability	8.5%
Under 18	2.9%
18–64 years	6.8%
65 and over	25.1%

Health insurance coverage

Type	%
Private insurance	82.1%
Public insurance	26.3%
No insurance	3.9%
Uninsured under 19	1.2%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	27,599	94.5%
Spanish	1,810	6.6%
Other Indo-European	843	3.1%
Asian & Pacific Islander	412	1.5%
Other languages	477	1.7%

Place of birth & citizenship

Origin	Count	%
Native born (US)	24,865	85.2%
Born in same state	24,396	83.6%
Born in different state	22,510	77.1%
Foreign born	469	1.6%
Naturalized citizen	4,328	14.8%
Not a US citizen	2,689	62.1%

Ancestry

Ancestry	Count	%
Italian	5,841	20%
Arab	1,381	4.7%
French	1,144	3.9%
Polish	234	0.8%
Irish	107	0.4%

Ancestry	Count	%
Norwegian	107	0.4%
German	98	0.3%
English	52	0.2%
Dutch	18	0.1%

Technology access

Metric	% of households
Computer access	30.7%
Internet access	96.0%

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

Frequently asked questions about ZIP code 11720

What city is ZIP code 11720 in?

ZIP code 11720 is primarily assigned to Centereach, New York.

What county is ZIP code 11720 in?

ZIP code 11720 falls within Suffolk County, New York.

Is ZIP code 11720 mostly owner-occupied?

83% of occupied units in ZIP code 11720 are owner-occupied, well above the national average.

What is the median household income in ZIP code 11720?

The median household income in ZIP code 11720 is $123,603, above the national median of ~$75,000.

What is the typical home value in ZIP code 11720?

The median home value in ZIP code 11720 is $438,500.

What is the population of ZIP code 11720?

ZIP code 11720 has an estimated population of 29,193 residents, with a density of 3,548 people per square mile.

What timezone is ZIP code 11720 in?

ZIP code 11720 observes the EST timezone.