| Name | Phone | Category |
| Oak Creek Apartments | 650-321-1701 | Real Estate |
| Office Depot | 510 289-4304 | Office Supplies |
| Omega Printing | 650-326-9901 | Printing & Copy Services |
| Oshman Family Jewish Community Center | 650-223-8658 | Community & Human Services |
| Otis Elevator Company | 408-328-4211 | Building |
