Southern Illinois University Carbondale
Campus Mail Code Look-Up
| Building Name | Postal Code |
| Labor and Employee Relations | 4319 |
| Laboratory Animal Program | 6506 |
| Language Media Center(COLA) | 4507 |
| Law, School of | 6804 |
| Learning Resource Service | 6510 |
| Legal Clinic | 6821 |
| Lentz Hall | 6617 |
| Lesar Law Library, School of Law | 6803 |
| Liberal Arts-Advisement, College of | 4523 |
| Liberal Arts-Dean's Office, College of | 4522 |
| Library Affairs | 6632 |
| Library Storage Building | 6830 |
| Linguistics | 4517 |
| Lutheran Center | 6711 |