- IAESTE LC Bochum - International Association for the Exchange of Students for Technical Experience
- ICAMS - Interdisciplinary Centre for Advanced Materials Simulation
- IFHV - Institute for International Law of Peace and Armed Conflict
- IFSC - Interfacial Systems Chemistry
- IKT - Institute for Underground Infrastructure
- Infopoint (Building UV, HZO and TUZ)
- Info-Points (Concierge Services)
- Information Technology and Electronics (Faculty)
- Institute for Advanced Study in the Humanities (KWI)
- Institute for Diaspora and Genocide Studies (IDG)
- Institute for E-Business Security
- Institute for German Cultural Studies
- Institutes - Central Academic Facilities
- INTCHEM - EU Early Stage Research Training
- Interdisciplinary Lectures
- Interdisziplinary Health Research (CENTRIG)
- Interfacial Systems Chemistry IFSC
- International Graduate School of Neuroscience (ISGN)
- International Law of Peace and Armed Conflict (Institute)
- International Office
- International Portal
- International School of IT Security - isits (gits AG)
- International Women's Studies - Marie Jahoda Visiting Chair
- Internationalization Office
- Internet for Students
- Introductory Classes
- Introductory Courses, subject-related
- Islamic Studies (and Oriental Studies)
- Isotope Laboratory - ZIL - RUBION
- IT-Security (Horst-Görtz-Institute)
- IT-Security (Office of the Rectorate)
