| Name | Phone | Category |
| C.M. Capital Corporation | 650-326-6480 | Financial Services |
| C2 Education | 650-494-7500 | Education |
| Café Pro Bono | 650-326-1626 | Restaurants, Cafes & Catering |
| Cafe Renzo | 650-329-8300 | Restaurants, Cafes & Catering |
| Cafe Venetia | 650-323-3600 | Restaurants, Cafes & Catering |
| California Cafe | 650-325-2233 | Restaurants, Cafes & Catering |
| California Pacific Commercial Corporation | 650-854-5104 | Real Estate |
| California Pizza Kitchen | 650-325-2753 | Restaurants, Cafes & Catering |
| California State Assembly-Rich Gordon | 650-691-2121 | Community & Government |
| Campo 185 | 650-614-1177 | Restaurants, Cafes & Catering |
| Canopy | 650-964-6110 | Environment |
| Cantabile Youth Singers of Silicon Valley | 650-424-1410 | Entertainment and Arts |
| Cardoza-Bungey Travel | 650-325-5600 | Travel Services |
| Care Indeed | 650-328-1001 | Health Services |
| Carrasco & Associates | 650-322-2288 | Architects |
| Casa dei Bambini Montessori School, Inc. | 650-473-9401 | Education |
| Cassidy Turley | 650-852-1200 | Real Estate |
| Castilleja School | 650-328-3160 | Education |
| Cavallino Collision | 650-326-9800 | Automotive |
| CEA California Employers Association | 800-399-5331 | Business to Business Resources |
| Celia's Mexican Restaurant #10 | 650-843-0643 | Restaurants, Cafes & Catering |
| Center for the Continuing Study of the California Economy | 650-321-8550 | Economic Research |
| CEP Town & Country Investors | 650-325-3266 | Shopping Centers |
| Channing House | 650-324-7560 | Retirement Communities |
| Charmelle 28 Fine Lingerie | 650-323-7979 | Lingerie |
| Children's Health Council | 650-326-5530 | Community & Human Services |
| The Chocolate Garage | Phone: (650) 796-5287 | Education |
| City of Palo Alto | 650-329-2100 | Community & Government |
| Coconuts Caribbean Restaurant and Bar | 650-329-9533 | Restaurants, Cafes & Catering |
| Coldwell Banker Commercial-Wilbur Properties | 650-847-4347 | Real Estate |
| Coldwell Banker Residential Brokerage, Palo Alto Downtown | 650-752-0700 | Real Estate |
| Comcast Business Class | 650-207-3737 | Telecommunications |
| Comerica Bank | 650-462-6117 | Business Referral Network Members |
| Comfort Inn Palo Alto / Stanford Area | 650-493-3141 | Hotels & Motels |
| Communications & Power Ind. | 650-846-2900 | Chamber Builder |
| Community Working Group, Inc. | 650-299-8700 | Community & Human Services |
| Conference Consultants | 650-324-1653 | Event Planning & Management |
| Congresswoman Anna Eshoo, District Office | 650.323.2984 | Community & Government |
| Cooley Godward LLP | 650-843-5000 | Attorneys |
| Jackie Copple- Coldwell Banker | 650-752-0866 | Real Estate |
| Copy Factory | 650-856-2020 | Business to Business Resources |
| Core Studio | 650-843-9465 | Fitness |
| Cornish & Carey | 650-688-8519 | Real Estate |
| Coronet Motel | 650-326-1081 | Hotels & Motels |
| Costanoa Lodge and Camp | 650-879-1100 | Hotels & Motels |
| Costco | 650-988-1841 | Wholesale |
| The Country Inn Motel | 650-948-9154 | Hotels & Motels |
| Coupa Cafe | 650-322-6879 | Restaurants, Cafes & Catering |
| Courtyard by Marriott Palo Alto - Los Altos | 650-941-9900 | Hotels & Motels |
| Creekside Inn Palo Alto | 650-493-2411 | Business Referral Network Members |
| Crescent Capital - Mortgage Professionals | 800-278-9880 | Mortgage |
| Crist, Biorn, Shepherd & Roskoph | 650-321-5000 | Attorneys |
| Crown Worldwide Moving & Storage | 510-614-4141 | Moving & Storage |
| Crowne Plaza Cabana - Palo Alto | 650-628-0124 | Chamber Builder |
