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City ZIP codes · New York

Uniondale, NY ZIP Codes

3 ZIP codes use the postal name Uniondale, New York (Census 2020 ZCTAs and GeoNames postal codes, October 2026): 2 residential and 1 for PO boxes or a single organization. Uniondale's most populous ZIP code is 11553, with 27,875 people (ACS 2020-2024); 98% of its land is in the city of Uniondale.

  • ACS2020-24
  • Census2020
  • GeoNames2026

Where are Uniondale's ZIP codes?

11553: $121k median household income11556: – median household income115531155611553: $121k median household income11556: – median household income115531155611553: $121k median household income11556: – median household income1155311556
The 2 residential ZIP codes named Uniondale, shaded by median household income in national fifths (ACS 2020-2024). Select a ZIP to open it. <$54.1k$98.1k+no figure

Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).

All 2 residential ZIP codes of Uniondale

Residential ZIP codes with the postal name Uniondale, NY, largest first (ACS 2020-2024); sort by any column
County
11553 Nassau County 27,875 8,609 $121k $512k
11556 Nassau County no residents 0 – –

Download the 3 ZIP codes as CSV

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; 2023 Gazetteer land areas (2020 ZCTAs); town names from simplemaps US ZIP Codes (CC BY 4.0) and GeoNames (CC BY 4.0).

PO Box and single-organization ZIP codes in Uniondale

1 ZIP code named Uniondale has no residential delivery area: post office boxes, or one organization (a large employer, an agency, a university) with its own code. The Census Bureau publishes no figures for them.

Uniondale, NY: ZIP codes without a residential area, for PO boxes or one organization (GeoNames postal codes; USPS does not publish openly which is which)
ZIPCounty
11555Nassau County

Source: GeoNames postal codes (CC BY 4.0); a ZIP code with no Census ZCTA has no residential delivery area.

Which counties do Uniondale's ZIP codes reach?

Uniondale's residential ZIP codes lie in Nassau County.

Which first three digits do Uniondale's ZIP codes use?

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Every ZIP code of Uniondale starts with 115.

Three-digit prefixes of Uniondale's ZIP codes, the sectional center for each (USPS labeling list L005, effective October 1, 2026) and how many of the prefix's codes are Uniondale's
PrefixSectional centerHereAll codes
115 West Nassau, NY (SCF 115) 3 46

Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.