What to know about ZIP 11556
ZIP code 11556 covers Uniondale, NY in Nassau County.
It sits in telephone area codes 363, 516; U.S. House district NY-4; the NEW YORK media market.
Uniondale CDP, NY
ZIP Code 11556 — Uniondale CDP, NY Demographics & Data
Source: U.S. Census Bureau ACS 2019–2023 5-Year Estimates. Page data updated 2026-08-02.
Low Snow Area
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Quick Facts
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At a glance
Overview of ZIP Code 11556
UniversityUniversity / college area
Local search focus: University
Uniondale, NY sits in a university / college context (near nassau community college (0.9 mi)). Expect stronger interest in student housing, rentals, walkability, transit, and a younger adult age mix versus typical suburban ZIPs.
Climate risk and migration signals
FEMA’s National Risk Index rates natural-hazard risk for Uniondale CDP, NY as Relatively High (composite score 97.1), which is among the highest nationally. The strongest component scores on US5 are flood (98.2) and hurricane (95.4). These scores are county-linked NRI values published for planning context — all ZIP codes in the same county share the same composite score on US5. Useful when comparing insurance and disaster exposure across areas, not a substitute for a parcel-level flood or fire determination.
Climate normals for Uniondale CDP, NY show little to no average snow and around 45.3 inches of annual precipitation.
Nearby (from this ZIP)
Airport FRG (8.9 miles (14.3 km)) · Nassau Community College (0.9 miles (1.4 km)) · Sagamore Hill National Historic Site (12.3 miles (19.9 km)) · VA: East Meadow Clinic (1.7 miles (2.7 km))
Full lists and map pins are in the Infrastructure section below.