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- Lab School, Toddler, Preschool, Kindergarten - (818) 677-3131
- Landscape/Grounds Services, Physical Plant Management - (818) 677-2241
- Language and Cultural Studies, College of Extended Learning - (818) 677-4767
- Language Learning Resource Center - (818) 677-3470
- Language, Speech and Hearing Center - (818) 677-2856
- Laserium - Donald E. Bianchi Planetarium Department of Physics and Astronomy (818) 677-5601
- Leadership Development, Student Development & International Program - (818) 677-2393
- Leadership Institute - (818) 677-8261
- Learning Disability Program/Computer Access Lab, Disability Resources - (818) 677-2684
- Learning Habits Project
- Learning Resource Center - (818) 677-2033
- Leaves of Absence, Non-Faculty, Family, Maternity, Medical, Military, etc. - (818) 677-2101
- Leisure and Play Behavior, Center for the Study of - (818) 677-3202
- Leisure Studies and Recreation (Effective Spring 2007: Recreation and Tourism Management) - (818) 677-3202
- Lesbian, Bisexual, Gay and Transgender Studies, Institute for - (818) 677-5737
- Liberal Studies B.A in the Department of Interdisciplinary Studies and Liberal Studies
- Library Catalog On-Line - (818) 677-2285
- Library, University - (818) 677-2285
- Licensing-Campus Facilities - (818) 677-2744
- Light Bulbs (PPM) - (818) 677-2222
- Linguistics/TESL Department, College of Humanities - (818) 677-3453
- Literacy Center, Los Angeles Times, Dept of Elementary Education (818) 677-3333
- Livescan & Notary Services (818) 677-2113
- Loans / Grants, Students - (818) 677-4734
- Logo / Word Mark Information for Cal State University Northridge (818)677-2130
- Los Angeles Teachers Center, LAUSD - (818) 677-2590
- Los Angeles Times Literacy Center, Elementary Education - (818) 677-3333
- Lost and Found (Police Services) - (818) 677-3946
- Lower Division Writing Requirements, Testing Center - (818) 677-2369
- Loyalty Oath