ZIP Code 77989 is located in Thomaston Texas. 77989 is entirely within DeWitt County. Regionally, it is located in the Victoria Area.
| ZIP Code Name | Thomaston |
| Primary County | DeWitt County |
| ZIP Code Type | PO Box |
| Current Time | CDT |
| Coordinates | 28.99716949,-97.15526581 |
| Adjacent ZIP Codes | |
| Region | Victoria Area |
| Time Zone | Central Daylight Time |
| IANA Timezone | America/Chicago |