For correctly addressing outgoing US envelopes, packages see:
Mailing Regulations
Library/Department Mailing addresses
| Office of the Director | 14S-216 | |
| Academic Media Production Services | NE48-308 | |
| Acquisitions, Metadata and Enterprise Systems | 14E-210 | |
| Administrative Services | 14S-328 | |
| Barker Engineering Library | 10-500 | |
| Collections Strategy and Management, Head | 14S-226 | |
| Curation and Preservation Services | 14-0513 | |
| Delivery Services | 14-0756 | |
| Dewey Library | E53-100 | |
| Document Services | 14-0551 | |
| Hayden Circulation | 14S-100 | |
| Hayden Reserves | 14S-100 | |
| Humanities Library | 14S-200 | |
| Information Delivery & Library Access, Head | 14S-134 | |
| Institute Archives & Special Collections | 14N-118 | |
| Instruction and Reference Services, Head | 14S-134 | |
| Interlibrary Loan | 14-0551 | |
| Lewis Music Library | 14E-109 | |
| Liaisons for Departments, Labs and Centers, Head | 14S-134 | |
| Library Storage Annex | N57-200 | |
| Rotch Library | 7-238 | |
| Science Library | 14S-134 | |
| Software Development and Analysis | E25-131 | |
| Specialized Content and Services, Head | 7-238 | |
| User Experience, Head | 10-500 | |
| Web Manager and Web Assistant | 10-500 | |