ZIP Codes in Pasco, WA
Pasco uses 1 ZIP code, all in Franklin County. Pick one below for details, or look up the full nine-digit ZIP+4 for a specific street address.
All 1 Pasco ZIP codes
| ZIP | Type | County | Population |
|---|---|---|---|
| 99301 | standard | Franklin | 87,044 |
Finding a ZIP+4 in Pasco
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 Pasco street almost always have different ZIP+4 codes even though they share all five leading digits.
Appending ZIP+4 to a mailing list?
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