ZIP Codes in Concrete, WA
Concrete uses 1 ZIP code, all in Skagit County. Pick one below for details, or look up the full nine-digit ZIP+4 for a specific street address.
All 1 Concrete ZIP codes
| ZIP | Type | County | Population |
|---|---|---|---|
| 98237 | standard | Skagit | 4,956 |
Finding a ZIP+4 in Concrete
Knowing which of these 1 ZIP codes covers an address only gets you partway. The four-digit extension identifies the specific delivery point — typically one side of one block. Two houses facing each other on the same Concrete street almost always have different ZIP+4 codes even though they share all five leading digits.
Appending ZIP+4 to a mailing list?
Upload a CSV of Concrete addresses and download it complete.