| Name | Phone | Category |
| Walgreens Drug Store, El Camino Real | 650-858-1898 | Drug Stores & Pharmacies |
| Wang, Hartmann, Gibbs & Cauley, P.C. | 650-209-2130 | Attorneys |
| Wareham Development | 415 457-5964 | Real Estate |
| WAVE ONE | 650.618.3010 | Environment |
| Webster Financial Corp. | 650-328-7477 | Real Estate |
| Webster House | 650-327-4333 | Retirement Communities |
| Wells Fargo Bank - California Ave. | 650-855-7515 | Banks & Credit Unions |
| Wells Fargo Bank - Stanford Barn | 650-289-1011 | Banks & Credit Unions |
| Wells Fargo, Peninsula Business Banking System | 650-614-8930 | Banks & Credit Unions |
| WeMatter.com | 650-323-2028 | Community & Government |
| West Bay Opera Association, Inc. | 650-843-3901 | Music |
| West Coast Yellow Pages, Inc. | 650-636-0300 | Advertising & Media |
| Westridge Wealth Strategies | 650 233-9122 | Financial Services |
| Whole Foods Market | 650-326-8676 | Grocers & Markets |
| Wilson Sonsini Goodrich & Rosati | 650-493-9300 | Attorneys |
| The Wine Room | 650-462-1968 | Restaurants, Cafes & Catering |
| Winter Lodge | 650-493-4566 | Recreation |
| Wm. H. Fry Construction Company | 408-605-8200 | Business Referral Network Members |
| World Centric | 650 283-3797 | Environment |
| World Wildlife Fund California Marine Office | 650-323-3538 | Associations, Clubs & Organizations |
| WSJ Properties | 650-493-5310 | Real Estate |
