United States Postcode Database

Country Information

CountryUnited States

ISO CodeUS / USA

LanguageEnglish

Total Records42,605

United States uses a numeric code of 5 (or 5+4) digits (e.g. 10001). ZIP Code (5 digits) with optional ZIP+4 extension.

This database currently holds 42,605 ZIP Codes ranging from 00501 to 99929, linked to 0 building and address records. Because a single ZIP Code can cover more than one locality or delivery point, the lookup below groups addresses by code and lets you drill into the individual records.

Postal codes matter well beyond mail delivery. Couriers, e-commerce checkout forms and address autocomplete tools rely on the ZIP Code to route a parcel and to verify that the stated address matches the code. Addresses here are organised as State → County → City. The code itself is structured as ZIP Code → ZIP+4 → Delivery Point, which is postal geography and not the same as the administrative hierarchy. When you look up a code here, treat the associated name as a reference point rather than a full postal address — always confirm the street and house number with the sender or recipient before shipping.

Data source: a third-party open dataset. This is an imported reference dataset, not a live government feed; CodeReff does not independently verify each record, so codes may have changed since the snapshot was taken. Use the search box to look up a specific code, or browse the paginated table below.

United States Postcode Data

42,605 postcode found

Postal Code	State	County	City	Records
11737	New York	Nassau	Farmingdale	1
11738	New York	Suffolk	Farmingville	1
11739	New York	Suffolk	Great River	1
11740	New York	Suffolk	Greenlawn	1
11741	New York	Suffolk	Holbrook	1
11742	New York	Suffolk	Holtsville	1
11743	New York	Suffolk	Huntington	1
11745	New York	Suffolk	Smithtown	1
11746	New York	Suffolk	Huntington Station	1
11747	New York	Suffolk	Melville	1
11749	New York	Suffolk	Islandia	1
11750	New York	Suffolk	Huntington Station	1
11751	New York	Suffolk	Islip	1
11752	New York	Suffolk	Islip Terrace	1
11753	New York	Nassau	Jericho	1
11754	New York	Suffolk	Kings Park	1
11755	New York	Suffolk	Lake Grove	1
11756	New York	Nassau	Levittown	1
11757	New York	Suffolk	Lindenhurst	1
11758	New York	Nassau	Massapequa	1
11760	New York	Suffolk	Islandia	1
11762	New York	Nassau	Massapequa Park	1
11763	New York	Suffolk	Medford	1
11764	New York	Suffolk	Miller Place	1
11765	New York	Nassau	Mill Neck	1
11766	New York	Suffolk	Mount Sinai	1
11767	New York	Suffolk	Nesconset	1
11768	New York	Suffolk	Northport	1
11769	New York	Suffolk	Oakdale	1
11770	New York	Suffolk	Ocean Beach	1
11771	New York	Nassau	Oyster Bay	1
11772	New York	Suffolk	Patchogue	1
11773	New York	Nassau	Syosset	1
11774	New York	Nassau	Farmingdale	1
11775	New York	Suffolk	Melville	1
11776	New York	Suffolk	Port Jefferson Station	1
11777	New York	Suffolk	Port Jefferson	1
11778	New York	Suffolk	Rocky Point	1
11779	New York	Suffolk	Ronkonkoma	1
11780	New York	Suffolk	Saint James	1
11782	New York	Suffolk	Sayville	1
11783	New York	Nassau	Seaford	1
11784	New York	Suffolk	Selden	1
11786	New York	Suffolk	Shoreham	1
11787	New York	Suffolk	Smithtown	1
11788	New York	Suffolk	Hauppauge	1
11789	New York	Suffolk	Sound Beach	1
11790	New York	Suffolk	Stony Brook	1
11791	New York	Nassau	Syosset	1
11792	New York	Suffolk	Wading River	1

Page 86 of 853 · 42,605 postcode

Postcodes by Region

Postcodes by City

Frequently Asked Questions

United States uses a numeric code of 5 (or 5+4) digits (e.g. 10001). ZIP Code (5 digits) with optional ZIP+4 extension.

Yes. United States postal codes are a plain numeric string, so a leading zero is part of the code itself. A code beginning with 0 must be written and stored with that zero — it is not the same as the same digits without it.

42,605 This database currently lists

The records are imported from a third-party open dataset, an open reference dataset. CodeReff does not independently verify each entry, so use the information as a reference rather than an official confirmation.

Enter a full or partial postal code, or a building or street name, in the search box above. You can also browse the paginated table and open any code to see its building and address records.