ZIP Code 78156 is located in Seguin Texas. 78156 is entirely within Guadalupe County. Regionally, 78156 is located in Metro San Antonio.
| ZIP Code Name | Seguin |
| Primary County | Guadalupe County |
| ZIP Code Type | PO Box |
| Current Time | CST |
| Coordinates | 29.56879807,-97.97010803 |
| Adjacent ZIP Codes | |
| Region | Metro San Antonio |
| Metropolitan/Micropolitan Stat Area | San Antonio-New Braunfels, TX |
| Time Zone | Central Standard Time |
| IANA Timezone | America/Chicago |
| School Districts in 78156 | |
| Elementary Schools in 78156 | |
| Middle Schools in 78156 | |
| High Schools in 78156 |