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
57722 South Dakota Custer Buffalo Gap 1
57724 South Dakota Harding Camp Crook 1
57725 South Dakota Pennington Caputa 1
57730 South Dakota Custer Custer 1
57732 South Dakota Lawrence Deadwood 1
57735 South Dakota Fall River Edgemont 1
57736 South Dakota Meade Elm Springs 1
57737 South Dakota Meade Enning 1
57738 South Dakota Custer Fairburn 1
57741 South Dakota Meade Fort Meade 1
57744 South Dakota Custer Hermosa 1
57745 South Dakota Pennington Hill City 1
57747 South Dakota Fall River Hot Springs 1
57748 South Dakota Meade Howes 1
57750 South Dakota Jackson Interior 1
57751 South Dakota Pennington Keystone 1
57752 South Dakota Shannon Kyle 1
57754 South Dakota Lawrence Lead 1
57755 South Dakota Harding Ludlow 1
57756 South Dakota Shannon Manderson 1
57758 South Dakota Meade Mud Butte 1
57759 South Dakota Lawrence Nemo 1
57760 South Dakota Butte Newell 1
57761 South Dakota Pennington New Underwood 1
57762 South Dakota Butte Nisland 1
57763 South Dakota Fall River Oelrichs 1
57764 South Dakota Shannon Oglala 1
57766 South Dakota Fall River Oral 1
57767 South Dakota Pennington Owanka 1
57769 South Dakota Meade Piedmont 1
57770 South Dakota Shannon Pine Ridge 1
57772 South Dakota Shannon Porcupine 1
57773 South Dakota Custer Pringle 1
57775 South Dakota Pennington Quinn 1
57776 South Dakota Harding Redig 1
57777 South Dakota Meade Red Owl 1
57779 South Dakota Lawrence Saint Onge 1
57780 South Dakota Pennington Scenic 1
57782 South Dakota Fall River Smithwick 1
57783 South Dakota Lawrence Spearfish 1
57785 South Dakota Meade Sturgis 1
57787 South Dakota Meade Union Center 1
57788 South Dakota Butte Vale 1
57790 South Dakota Pennington Wall 1
57791 South Dakota Pennington Wasta 1
57792 South Dakota Meade White Owl 1
57793 South Dakota Lawrence Whitewood 1
57794 South Dakota Shannon Wounded Knee 1
57799 South Dakota Lawrence Spearfish 1
58001 North Dakota Richland Abercrombie 1

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.
Information provided on CodeReff is for reference purposes only. Always verify financial and banking details with the relevant institution before use.