ZIP Code 11720, New York
ZIP Code 11720 profile, demographic data, and geographic information.
ZCTA5 11720 is a 5-digit ZIP Code area located in Suffolk County, New York. As of official census estimates, it has a reported population of 29,292. The land area covers 8.24 sq mi. [1]
Demographics & Population
| Demographic Metric | Estimate / Count | Margin of Error | Survey Period / Source |
|---|---|---|---|
| Total Population | 29,292 | ±1,988 | 2020-2024 / Census ACS 5-Year 2024 |
| Median Age | 38.8 yrs | ±1.4 | 2020-2024 / Census ACS 5-Year 2024 |
| Total Households | 8,860 | ±538 | 2020-2024 / Census ACS 5-Year 2024 |
Source: U.S. Census Bureau (PEP, ACS 5-Year).
Housing & Real Estate Profile
| Housing Metric | Estimate / Value | Margin of Error |
|---|---|---|
| Total Housing Units | 9,529 | ±517 |
| Occupied Housing Units | 8,860 | ±538 |
| Vacant Housing Units | 669 | ±225 |
| Median Home Value | $518,600 | ±$20,021 |
| Median Gross Rent | $2,374 | ±$294 |
Source: U.S. Census Bureau ACS 5-Year (2020-2024).
Economy & Workforce
| Economic Metric | Estimate / Value | Margin of Error |
|---|---|---|
| Median Household Income | $134,898 | ±$10,580 |
| Per Capita Income | $48,733 | ±$2,369 |
| Poverty Rate | 5.2% | ±1.6% |
| Population Below Poverty Level | 1,522 | ±474 |
| Unemployment Rate | 6% | ±2% |
| Civilian Labor Force, Employed | 14,731 | ±1,091 |
| Broadband Internet Rate | 94.9% | ±8.1% |
Source: U.S. Census Bureau ACS 5-Year (2020-2024).
Local Government & Public Administration
Authoritative general-purpose local government units serving this area
U.S. Census Bureau GUS (2026) / GMAF
| Government Unit | Unit Type | Jurisdiction Role | Contact / Address |
|---|---|---|---|
|
GUS Population: 1,535,909 (2024)
ID: 170437
|
County | Official County Government |
Contact: MUNICIPAL LAW BUREAU CHIEF
PO BOX 6100, HAUPPAUGE NY 11788-0099
|
Education
Listing 10 local institutions (NCES 2024-2025)
External reference via K12Guides
| Institution | Type | Grades | Location |
|---|---|---|---|
| Regular School Nearby | KG-06 | WYANDANCH, NY | |
| Regular School Nearby | KG-05 | BAYPORT, NY | |
| Regular School Nearby | KG-05 | SMITHTOWN, NY | |
| Regular School Nearby | 06-08 | SMITHTOWN, NY | |
| Regular School Nearby | 06-08 | SHOREHAM, NY | |
| Regular School Nearby | KG-05 | LINDENHURST, NY | |
| Regular School Nearby | KG-02 | MILLER PLACE, NY | |
| Regular School Nearby | KG-06 | ISLANDIA, NY | |
| Regular School Nearby | PK-06 | CENTRAL ISLIP, NY | |
| Regular School Nearby | PK-06 | EAST SETAUKET, NY |
Source: k12guides.com.
Community Facilities & Infrastructure
Displaying 10 civic institutions across 2 datasets queried
CMS • IPEDS • IMLS
| Facility Name | Category | Relationship | Address / Location | Contact |
|---|---|---|---|---|
|
Suffolk County Community College
|
College | 2.0 mi away | 533 College Rd, Selden, NY, 11784-2899 |
6314514110
|
|
MIDDLE COUNTRY PUBLIC LIBRARY - CENTEREACH
|
Library | 0.4 mi away | 101 EASTWOOD BOULEVARD, CENTEREACH, NY, 11720 |
(631) 585-9393
|
|
Stony Brook University
|
College | 3.7 mi away | 310 Administration Building, Stony Brook, NY, 11794-0701 |
6316326000
|
|
MIDDLE COUNTRY PUBLIC LIBRARY - SELDEN
|
Library | 2.6 mi away | 575 MIDDLE COUNTRY ROAD, SELDEN, NY, 11784 |
(631) 585-9393
|
|
Long Island Beauty School-Hauppauge
|
College Vocational | 6.8 mi away | 544 Rte 111, Hauppauge, NY, 11788 |
6317240440
|
|
SACHEM PUBLIC LIBRARY
|
Library | 3.3 mi away | 150 HOLBROOK ROAD, HOLBROOK, NY, 11741 |
(631) 588-5024
|
|
Access Careers-Islandia
|
College Vocational | 6.9 mi away | 1930 Veterans Highway, Suite 10, Islandia, NY, 11749-1599 |
6316309410
|
|
COMSEWOGUE PUBLIC LIBRARY
|
Library | 4.0 mi away | 170 TERRYVILLE ROAD, PORT JEFFERSON STA., NY, 11776 |
(631) 928-1212
|
|
New York Institute of Beauty
|
College Vocational | 7.3 mi away | 11 Oval Drive Suite 180, Islandia, NY, 11749-1479 |
6315824737
|
|
THE SMITHTOWN LIBRARY - NESCONSET BRANCH
|
Library | 4.6 mi away | 148 SMITHTOWN BOULEVARD, NESCONSET, NY, 11767 |
(631) 360-2480
|
Distances calculated from authoritative source coordinates. Source: CMS, IMLS, NCES IPEDS.
Climate & Weather Observations
NOAA Monthly Climate Normals
Observation Station: Climate data reflects NOAA 1991–2020 standard normals recorded at ISLIP LI MACARTHUR AP, NY US, located 5.4 miles from ZCTA5 11720. Local microclimates, topography, and elevation may cause municipal conditions to differ.
| Month | High (°F) | Low (°F) | Mean (°F) | Precip (in) | Snow (in) |
|---|---|---|---|---|---|
| January | 39.2° | 24.6° | 31.9° | 3.66" | 10.3" |
| February | 41.0° | 25.5° | 33.3° | 3.29" | 9.4" |
| March | 47.7° | 32.0° | 39.9° | 4.51" | 6.5" |
| April | 58.3° | 41.2° | 49.7° | 4.06" | 0.6" |
| May | 68.3° | 50.8° | 59.5° | 3.28" | 0.0" |
| June | 77.2° | 60.9° | 69.0° | 4.00" | 0.0" |
| July | 82.8° | 67.3° | 75.0° | 3.26" | 0.0" |
| August | 81.4° | 66.0° | 73.7° | 4.24" | 0.0" |
| September | 74.8° | 58.9° | 66.9° | 3.60" | 0.0" |
| October | 64.1° | 47.3° | 55.7° | 3.97" | 0.0" |
| November | 53.6° | 37.6° | 45.6° | 3.41" | 0.5" |
| December | 44.4° | 29.8° | 37.1° | 4.71" | 4.5" |
Source: NOAA U.S. Climate Normals (1991–2020).
Local Weather Forecast
Weather forecast data is currently unavailable in the local cache.
Nearby Cities & Communities
Listing adjacent communities by spatial proximity (miles)
Proximity discovery
| Community Name | Classification | Distance | Population |
|---|---|---|---|
| Centereach CDP | CDP | 0.2 mi | — |
| Selden CDP | CDP | 1.9 mi | — |
| Lake Grove village | Village | 2.0 mi | — |
| Farmingville CDP | CDP | 3.1 mi | — |
| Lake Ronkonkoma CDP | CDP | 3.2 mi | — |
| Terryville CDP | CDP | 3.2 mi | — |
Sources & Data Provenance
- Geographic Classification & Identifiers: U.S. Census Bureau Gazetteer (2026) and TIGER/Line Shapefiles. GEOID: 11720. • Official Source Dataset →
- Socioeconomic & Housing Metrics: U.S. Census Bureau American Community Survey (ACS) 5-year estimates and Population Estimates Program (PEP). Margin of Error (MOE) intervals are reported where published; suppressed values are never estimated or replaced with false zeros.
- Civic Directory Datasets: Centers for Medicare & Medicaid Services (CMS Hospital Directory), National Center for Education Statistics (NCES IPEDS Postsecondary Directory), and Institute of Museum and Library Services (IMLS Public Libraries Survey). Airport landing facilities are provided by airport-data.com.
- Weather & Climate Observations: National Oceanic and Atmospheric Administration (NOAA) U.S. Climate Normals 1991–2020 and National Weather Service (NWS) point forecasts.