ZIP code · Mastic Beach · New York · United States
ZIP code 11951 — Mastic Beach
ZIP code 11951 serves Mastic Beach, New York.
- Postal code
- 11951Single source Value from one source, not cross-checked.
- City
- Mastic Beach
- County
- Suffolk FIPS 36103
- State
- New York
- Country
- United States
- Coordinates
- 40.7657, -72.8537 — precision precise (locality)
View on OpenStreetMap - Population
- 15,830 (ZCTA, ACS 5-year)
- Population density
- 3,298 / sq mi
- Land area
- 4.8 sq mi (12.4 km²) (ZCTA, ACS 5-year)
- Median household income
- $108,877
- Per-capita income
- $36,812
- Median age
- 38.4
- Households
- 4,953
- Housing units
- 5,352
- Median home value
- $321,200
- Median gross rent
- $2,313 / month
- Congressional district
- NY-2 (119th Congress)
- USDA hardiness zone
- 7a (0 to 5 °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 11951 with another ZIP · ZIPs within 25 miles · distance from 11951
Map of ZIP code 11951
Climate — monthly normals
Warmest month Jul (avg high 83°F), coldest Jan (avg low 24°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 39 | 41 | 47 | 58 | 68 | 77 | 83 | 81 | 74 | 64 | 54 | 45 |
| Avg low °F | 24 | 25 | 31 | 40 | 49 | 60 | 66 | 65 | 57 | 46 | 37 | 29 |
| Precip in | 3.0 | 3.1 | 4.6 | 4.1 | 3.5 | 3.7 | 3.2 | 3.0 | 3.9 | 4.0 | 3.6 | 4.5 |
NOAA 1991–2020 climate normals from the nearest station: SHIRLEY BROOKHAVEN AP (4.0 mi) · NOAA NCEI
Places in ZIP 11951
- 1 schools
- 4 parks
- 1 playgrounds
- 2 places of worship
- 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