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
98213 Washington Snohomish Everett 1
98220 Washington Whatcom Acme 1
98221 Washington Skagit Anacortes 1
98222 Washington San Juan Blakely Island 1
98223 Washington Snohomish Arlington 1
98224 Washington King Baring 1
98225 Washington Whatcom Bellingham 1
98226 Washington Whatcom Bellingham 1
98227 Washington Whatcom Bellingham 1
98228 Washington Whatcom Bellingham 1
98229 Washington Whatcom Bellingham 1
98230 Washington Whatcom Blaine 1
98231 Washington Whatcom Blaine 1
98232 Washington Skagit Bow 1
98233 Washington Skagit Burlington 1
98235 Washington Skagit Clearlake 1
98236 Washington Island Clinton 1
98237 Washington Skagit Concrete 1
98238 Washington Skagit Conway 1
98239 Washington Island Coupeville 1
98240 Washington Whatcom Custer 1
98241 Washington Snohomish Darrington 1
98243 Washington San Juan Deer Harbor 1
98244 Washington Whatcom Deming 1
98245 Washington San Juan Eastsound 1
98247 Washington Whatcom Everson 1
98248 Washington Whatcom Ferndale 1
98249 Washington Island Freeland 1
98250 Washington San Juan Friday Harbor 1
98251 Washington Snohomish Gold Bar 1
98252 Washington Snohomish Granite Falls 1
98253 Washington Island Greenbank 1
98255 Washington Skagit Hamilton 1
98256 Washington Snohomish Index 1
98257 Washington Skagit La Conner 1
98258 Washington Snohomish Lake Stevens 1
98259 Washington Snohomish North Lakewood 1
98260 Washington Island Langley 1
98261 Washington San Juan Lopez Island 1
98262 Washington Whatcom Lummi Island 1
98263 Washington Skagit Lyman 1
98264 Washington Whatcom Lynden 1
98266 Washington Whatcom Maple Falls 1
98267 Washington Skagit Marblemount 1
98270 Washington Snohomish Marysville 1
98271 Washington Snohomish Marysville 1
98272 Washington Snohomish Monroe 1
98273 Washington Skagit Mount Vernon 1
98274 Washington Skagit Mount Vernon 1
98275 Washington Snohomish Mukilteo 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.