Southern Illinois University Carbondale
Campus Mail Code Look-Up
| Building Name | Postal Code |
| GLBT Resource Center | 4724 |
| Geography & Environmental Resources | 4514 |
| Geology | 4324 |
| Graduate & Professional Student Council(GPSC) | 4419 |
| Graduate School | 4716 |
| Greek Row Area Office | 6814 |
| Grinnell Hall | 6734 |