ZIP Codes in Saint Joseph, MO
Saint Joseph uses 6 ZIP codes, all in Buchanan, Andrew Counties. Pick one below for details, or look up the full nine-digit ZIP+4 for a specific street address.
All 6 Saint Joseph ZIP codes
| ZIP | Type | County | Population |
|---|---|---|---|
| 64501 | standard | Buchanan | 10,689 |
| 64503 | standard | Buchanan | 11,954 |
| 64504 | standard | Buchanan | 10,068 |
| 64505 | standard | Andrew | 14,107 |
| 64506 | standard | Buchanan | 21,461 |
| 64507 | standard | Buchanan | 13,991 |
Finding a ZIP+4 in Saint Joseph
Knowing which of these 6 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 Saint Joseph street almost always have different ZIP+4 codes even though they share all five leading digits.
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