- Nationwide Health Plans
- Natividad
- Naval Hospital Camp Pendleton
- Naval Medical Center San Diego
- Navigant
- NBCUniversal
- NEC Electronics America Inc.
- Nevada County Department of Social Services
- New West Petroleum
- New World System
- Nicholas Green Foundation
- Nolte
- Noresco
- North Sacramento School District
- NorthBay Health
- Northbay Healthcare - Northbay Medical Center and Vacavalley Hospital
- Northeast Medical Services
- Northern California Presbyterian Homes and Services
- Northern Santa Barbara County United Way
- Northridge Hospital Medical Center
- Northrop Grumman
- Nuvelo
- O'Connor Hospital
- Oakland Convention and Visitors Bureau
- Office of Samoan Affairs
- Office Solutions
- Ogilvy Public Relations
- Ohlone College
- Olive View-UCLA Medical Center
- Olympia Medical Center
- OMMI - Means
- Omnitourism
- One Touch Technologies Corporation
- OneLegacy
- OneSource Distributors, Inc.
- Optometry Board
- Oracle
- Orange Coast Association Of Realtors
- Orange County Association of Realtors
- Orange County Global Medical Center
- Orchard Hotel, San Francisco
- Oroville Hospital
- Outsourcing Management Group
- Ovation Research Group
- Pacific Coast Building Products
- Pacific Data Designs, Inc
- Pacific Gas and Electic
- Pacific Gas and Electronics
- Pacific Health Alliance
- Pacific Islander Community Council