ZIP Codes in Baytown, TX
Baytown uses 3 ZIP codes, all in Harris, Chambers Counties. Pick one below for details, or look up the full nine-digit ZIP+4 for a specific street address.
All 3 Baytown ZIP codes
| ZIP | Type | County | Population |
|---|---|---|---|
| 77520 | standard | Harris | 36,355 |
| 77521 | standard | Harris | 69,038 |
| 77523 | standard | Chambers | 30,186 |
Finding a ZIP+4 in Baytown
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 Baytown 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 Baytown addresses and download it complete.