ZIP code · Greenlawn · New York · United States
ZIP code 11740 — Greenlawn
ZIP code 11740 serves Greenlawn, New York.
- Postal code
- 11740Single source Value from one source, not cross-checked.
- City
- Greenlawn
- County
- Suffolk FIPS 36103
- State
- New York
- Country
- United States
- Coordinates
- 40.8621, -73.3646 — precision precise (locality)
View on OpenStreetMap - Population
- 10,699 (ZCTA, ACS 5-year)
- Population density
- 2,920 / sq mi
- Land area
- 3.7 sq mi (9.5 km²) (ZCTA, ACS 5-year)
- Median household income
- $161,705
- Per-capita income
- $66,679
- Median age
- 42.8
- Households
- 3,650
- Housing units
- 3,662
- Median home value
- $686,900
- Congressional district
- NY-1 (119th Congress)
- USDA hardiness zone
- 7b (5 to 10 °F)Planting / growing zone from the 2023 USDA Plant Hardiness Zone Map: average annual extreme minimum temperature, 1991–2020.
- Time zone
- America/New_York (UTC−5 / UTC−4 DST)
Tools: compare 11740 with another ZIP · ZIPs within 25 miles · distance from 11740
Map of ZIP code 11740
Climate — monthly normals
Warmest month Jul (avg high 83°F), coldest Jan (avg low 25°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 38 | 40 | 47 | 60 | 70 | 78 | 83 | 81 | 74 | 63 | 52 | 43 |
| Avg low °F | 25 | 25 | 31 | 41 | 51 | 60 | 66 | 65 | 59 | 49 | 39 | 31 |
| Precip in | 3.7 | 3.1 | 4.2 | 4.1 | 3.9 | 4.3 | 3.8 | 4.3 | 4.7 | 4.3 | 3.5 | 4.6 |
NOAA 1991–2020 climate normals from the nearest station: CENTERPORT (1.6 mi) · NOAA NCEI
Places in ZIP 11740
- 7 schools
- 1 doctors & dentists
- 1 pharmacies
- 6 restaurants & cafés
- 7 parks
- 7 playgrounds
- 1 gyms & sports centres
- 1 libraries
- 1 post offices
- 4 places of worship
- 3 banks
- 1 gas stations
- 1 police & fire stations
Places mapped inside this ZIP’s ZCTA area in OpenStreetMap. OSM is community-maintained: counts reflect what has been mapped, and completeness varies by area — treat them as at-least figures. © OpenStreetMap contributors (ODbL) · Methodology
About this page
US ZIP codes have five digits. They are postal routing areas, not administrative boundaries: a ZIP can span more than one city or county, and the city shown is the primary USPS name for that code.
GeoNames · U.S. Census Bureau (ACS) · U.S. Census Bureau · NOAA NCEI · usda-phzm. Data generated on 2026-08-21. Methodology · Report an error on this page