| Name | Phone | Category |
| Waldrof School of the Peninsula | 650-948-8433 | Education |
| Walgreens Drug Store, El Camino Real | 650-858-1898 | Drug Stores & Pharmacies |
| The Walking Company | 650-462-1784 | Shopping & Retail |
| Wareham Development | 510 457-4964 | Real Estate |
| Webster Financial Corp. | 650-328-7477 | Real Estate |
| Webster House | 650-327-4333 | Retirement Communities |
| Wells Fargo Bank | 650-569-4410 | Financial Services |
| Wells Fargo, Peninsula Business Banking System | 650-846-2421 | Banks & Credit Unions |
| Wemorph, Inc. | 650-485-2505 | Printing & Copy Services |
| West Bay Opera Association, Inc. | 650-843-3900 | Music |
| West Coast Yellow Pages, Inc. | | Advertising & Media |
| Westin Palo Alto | 650-321-4422 | Hotels & Motels |
| WHGC, A Professional Law Corporation | 650-209-2130 | Attorneys |
| Whitclem Enterprises Inc. DBA Spoloan | 650-529-4700 | Mortgage |
| Whole Foods Market | 650-326-8676 | Grocers & Markets |
| Lynn Wilson Roberts- Alain Pinel | 650-255-6987 | Real Estate |
| Windows And Beyond, Inc. | 650-938-8822 | Home & Office |
| The Wine Room | 650-462-1968 | Food & Beverage |
| Winter Lodge | 650-493-4566 | Recreation |
| Workspring | 650-308-9350 | Coworking Space |
| WSJ Properties | 650-493-5310 | Real Estate |
