| Name | Phone | Category |
| Safeway, Inc. | 925-467-3000 | Grocers & Markets |
| Sand Hill Advisors | 650-854-9150 | Financial Services |
| SandGarden Law Group | 408 501-8862 | Business Referral Network Members |
| Santa Clara Valley Water District | 408-265-2600 | Community & Government |
| Sarah Tull, CPA | 650-617-0415 | Accounting & Bookkeeping Services |
| The Scharff Law Group, Inc. | 650-325-7200 | Attorneys |
| Schaub's Meat, Fish & Poultry | 650-325-6328 | Grocers & Markets |
| Hank Scherf | 650-286-5849 | Business Referral Network Members |
| Schiller Construction Inc | 650-940-1982 | Building |
| Scott Nabeta D.D.S., and Myrabelle Salcedo, D.D.S | 650-321-0915 | Health Services |
| Scott's Seafood | 650-323-1555 | Restaurants, Cafes & Catering |
| Howie's Artisan Pizza | 650 32-PIZZA | Restaurants, Cafes & Catering |
| Selix Formal Wear | 650-321-2770 | Clothing |
| Service.com | 650-868-1307 | |
| Shady Lane | 650-321-1099 | Shopping & Retail |
| Sharon Green Apartments | 650-854-3900 | Real Estate |
| Sharper Technology, Inc. | 650-964-4600 | Computers and Electronics |
| Sheraton Palo Alto Hotel | 650-328-2800 | Leaders Circle |
| Sigona's Farmers Market | 650-329-1340 | Grocers & Markets |
| Silicon Valley (San Jose) Business Journal | 408-295-3800 | Leaders Circle |
| Silicon Valley Association of Realtors | 408-200-0100 | Real Estate |
| Silicon Valley Education Foundation | 408-790-9400 | Community & Human Services |
| Craig Ruess, Sirius Business Solutions, Inc | 650-321-4229 | Internet Marketing |
| Nelson Staffing | 650-595-8020 | Staffing Services |
| Skadden, Arps, Slate, Meagher & Flom LLP | 650-470-4510 | Attorneys |
| SkinSpirit | 650-324-9600 | Spas |
| Smith Venture Group | 650-327-7323 | Financial Services |
| Snip-its | 650-323-8330 | Beauty Salons & Services |
| Sonoma Teriyaki | 707-448-2551 | Restaurants, Cafes & Catering |
| Space Systems/Loral | 650-852-4988 | Technology |
| Spot - A Pizza Place | 650 324-3131 | Restaurants, Cafes & Catering |
| Stanford Alumni Association | 650-723-2021 | Associations, Clubs & Organizations |
| Stanford Blood Center | 650-723-7831 | Hospitals & Clinics |
| Stanford Electric Works | 650-323-4139 | Building |
| Stanford Federal Credit Union | 650-723-2509 | Banks & Credit Unions |
| Stanford Financial Company Realtors | 650-321-2600 | Real Estate |
| Stanford Flying Club | 650-858-2200 | Aircraft Flight Training |
| Stanford Hospital & Clinics | 650-724-2462 | Leaders Circle |
| Stanford Lively Arts | 650-725-ARTS(2787) | Entertainment and Arts |
| Stanford Shopping Center | 650-617-8200 | |
| Stanford Terrace Inn | 650-857-0333 | Hotels & Motels |
| Stanford University | 650-725-3329 | Leaders Circle |
| Stanford University Athletic Department | 650-723-1021 | Education |
| Greg Stange, Coldwell Banker | 650-752-0815 | Real Estate |
| Star One Credit Union | 408-543-5202 | Banks & Credit Unions |
| Starburst Construction Company, Inc. | 408-448-1328 | Building |
| State Farm Insurance | 650-326-0660 | Insurance Services |
| Stern Mortgage Company | 650-322-7277 | Mortgage |
| Stoecker & Northway Architects, Inc. | 650-327-7070 | Architects |
| Strutz LeVett Investment Co. | 650-321-0440 | Real Estate |
| Stuart Leeb & Associates | 650-493-5332 | Real Estate |
| Studio Kicks Palo Alto | 650-855-9868 | Fitness |
| Sullivan & Cromwell LLP | 650-461-5600 | Attorneys |
| SummerHill Homes | 650-857-0122 | Real Estate |
| Sun Water Solar | 510-233-0300 | |
| Sundance The Steakhouse | 650-321-6798 | Restaurants, Cafes & Catering |
| Sunshine Preschool | 650-493-0665 | Education |
| Super 8 Motel | 650-493-9085 | Hotels & Motels |
