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
57574 South Dakota Bennett Tuthill 1
57576 South Dakota Lyman Vivian 1
57577 South Dakota Jackson Wanblee 1
57579 South Dakota Mellette White River 1
57580 South Dakota Tripp Winner 1
57584 South Dakota Tripp Witten 1
57585 South Dakota Mellette Wood 1
57601 South Dakota Walworth Mobridge 1
57620 South Dakota Perkins Bison 1
57621 South Dakota Corson Bullhead 1
57622 South Dakota Ziebach Cherry Creek 1
57623 South Dakota Ziebach Dupree 1
57625 South Dakota Dewey Eagle Butte 1
57626 South Dakota Meade Faith 1
57630 South Dakota Dewey Glencross 1
57631 South Dakota Walworth Glenham 1
57632 South Dakota Campbell Herreid 1
57633 South Dakota Dewey Isabel 1
57634 South Dakota Corson Keldron 1
57636 South Dakota Dewey Lantry 1
57638 South Dakota Perkins Lemmon 1
57639 South Dakota Corson Little Eagle 1
57640 South Dakota Perkins Lodgepole 1
57641 South Dakota Corson McIntosh 1
57642 South Dakota Corson McLaughlin 1
57644 South Dakota Perkins Meadow 1
57645 South Dakota Corson Morristown 1
57646 South Dakota Campbell Mound City 1
57648 South Dakota Campbell Pollock 1
57649 South Dakota Perkins Prairie City 1
57650 South Dakota Harding Ralph 1
57651 South Dakota Harding Reva 1
57652 South Dakota Dewey Ridgeview 1
57656 South Dakota Dewey Timber Lake 1
57657 South Dakota Corson Trail City 1
57658 South Dakota Corson Wakpala 1
57659 South Dakota Corson Walker 1
57660 South Dakota Corson Watauga 1
57661 South Dakota Dewey Whitehorse 1
57701 South Dakota Pennington Rapid City 1
57702 South Dakota Pennington Rapid City 1
57703 South Dakota Pennington Rapid City 1
57706 South Dakota Meade Ellsworth Air Force Base 1
57709 South Dakota Pennington Rapid City 1
57714 South Dakota Bennett Allen 1
57716 South Dakota Shannon Batesland 1
57717 South Dakota Butte Belle Fourche 1
57718 South Dakota Meade Black Hawk 1
57719 South Dakota Pennington Box Elder 1
57720 South Dakota Harding Buffalo 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.