ZIP Codes in Katy, TX
Katy uses 4 ZIP codes, all in Harris, Fort Bend Counties. Pick one below for details, or look up the full nine-digit ZIP+4 for a specific street address.
All 4 Katy ZIP codes
| ZIP | Type | County | Population |
|---|---|---|---|
| 77449 | standard | Harris | 130,028 |
| 77450 | standard | Harris | 71,906 |
| 77493 | standard | Harris | 71,484 |
| 77494 | standard | Fort Bend | 140,157 |
Finding a ZIP+4 in Katy
Knowing which of these 4 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 Katy 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 Katy addresses and download it complete.