ZIP Code 78604 is located in Belmont Texas. 78604 is entirely within Gonzales County. Regionally, it is located in Metro San Antonio.
| ZIP Code Name | Belmont |
| Primary County | Gonzales County |
| ZIP Code Type | PO Box |
| Current Time | CDT |
| Coordinates | 29.52358246,-97.68407440 |
| Adjacent ZIP Codes | |
| Region | Metro San Antonio |
| Time Zone | Central Daylight Time |
| IANA Timezone | America/Chicago |
| US Congressional Districts in 78604 | |
| Texas State Senate Districts in 78604 | |
| Texas State House of Representatives Districts in 78604 |
| School Districts in 78604 |