ZIP code · Saint James · New York · United States
ZIP code 11780 — Saint James
ZIP code 11780 serves Saint James, New York.
- Postal code
- 11780Single source Value from one source, not cross-checked.
- City
- Saint James
- County
- Suffolk FIPS 36103
- State
- New York
- Country
- United States
- Coordinates
- 40.8813, -73.1591 — precision precise (locality)
View on OpenStreetMap - Population
- 15,586 (ZCTA, ACS 5-year)
- Population density
- 1,355 / sq mi
- Land area
- 11.5 sq mi (29.8 km²) (ZCTA, ACS 5-year)
- Median household income
- $141,576
- Per-capita income
- $74,132
- Median age
- 47.8
- Households
- 5,576
- Housing units
- 5,907
- Median home value
- $702,900
- Median gross rent
- $2,322 / month
- 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 11780 with another ZIP · ZIPs within 25 miles · distance from 11780
Map of ZIP code 11780
Climate — monthly normals
Warmest month Jul (avg high 83°F), coldest Jan (avg low 26°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 40 | 41 | 48 | 60 | 69 | 78 | 83 | 82 | 75 | 64 | 53 | 45 |
| Avg low °F | 26 | 26 | 32 | 41 | 50 | 60 | 66 | 65 | 60 | 49 | 39 | 31 |
NOAA 1991–2020 climate normals from the nearest station: SETAUKET STRONG (6.0 mi) · NOAA NCEI
Places in ZIP 11780
- 8 schools
- 1 doctors & dentists
- 4 restaurants & cafés
- 11 parks
- 4 playgrounds
- 1 gyms & sports centres
- 1 post offices
- 6 places of worship
- 1 gas stations
- 1 EV charging stations
- 3 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