ZIP Code 77203 is located in Houston Texas. 77203 is entirely within Harris County. Regionally, it is located in Metro Houston.
| ZIP Code Name | Houston |
| Primary County | Harris County |
| ZIP Code Type | PO Box |
| Current Time | CDT |
| Coordinates | 29.75809479,-95.36137390 |
| Adjacent ZIP Codes | |
| Region | Metro Houston |
| Metropolitan/Micropolitan Stat Area | Houston-The Woodlands-Sugar Land, TX |
| Time Zone | Central Daylight Time |
| IANA Timezone | America/Chicago |