ZIP Codes in Hammond, LA
Hammond uses 3 ZIP codes, all in Tangipahoa County. Pick one below for details, or look up the full nine-digit ZIP+4 for a specific street address.
All 3 Hammond ZIP codes
| ZIP | Type | County | Population |
|---|---|---|---|
| 70401 | standard | Tangipahoa | 21,221 |
| 70402 | standard | Tangipahoa | 1,850 |
| 70403 | standard | Tangipahoa | 30,173 |
Finding a ZIP+4 in Hammond
Knowing which of these 3 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 Hammond street almost always have different ZIP+4 codes even though they share all five leading digits.
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