| Name | Phone | Category |
| CAADA - California Avenue Area Development Association | 650-688-6295 | Associations, Clubs & Organizations |
| Cabaña Hotel and Resort Palo Alto | 650-857-0787 | |
| Café Pro Bono | 650-326-1626 | Restaurants, Cafes & Catering |
| Caffe del Doge | 650-323-3600 | Restaurants, Cafes & Catering |
| California Cafe | 650-325-2233 | Restaurants, Cafes & Catering |
| California Association of Employers | 800-399-5331 | Business to Business Resources |
| California Pacific Commercial Corporation | 650-854-5104 | Real Estate |
| Canopy | 650-964-6110 | Environment |
| Cantor Arts Center at Stanford | 650-725-4657 | Museums |
| Cardinal Hotel | 650-323-5101 | Hotels & Motels |
| Cardoza-Bungey Travel | 650-325-5600 | Travel Services |
| Carrasco & Associates | 650-322-2288 | Architects |
| Casa dei Bambini Montessori School, Inc. | 650-473-9401 | Education |
| Cashin Company Realtors | 650-614-3500 | Real Estate |
| Castilleja School | 650-328-3160 | Education |
| Cavallino Collision | 650-326-9800 | Automotive |
| CEP Town & Country Investors | 650-325-3266 | Shopping Centers |
| Chamber Publishing | 925-600-9170 | Publishers |
| Channing House | 650-324-7596 | Retirement Communities |
| Chantilly Restaurant | 650-321-4080 | Restaurants, Cafes & Catering |
| Kathy Thielke Chen | 415-577-3113 | Event Planning & Management |
| Mike Chen | 408-891-1610 | Writers |
| Childrens' Creative Learning Center | 408-732-2500 | Community & Human Services |
| The Children's Health Council | 650-326-5530 | Community & Human Services |
| City of Palo Alto | 650-329-2100 | Community & Government |
| Classic Residence by Hyatt in Palo Alto | 650-853-5001 | Retirement Communities |
| Clear Chiropractic | 650-328-4411 | Health Services |
| CMIT Solutions of Greater Palo Alto | 650-403-2050 | Computers and Electronics |
| Coast Capital Corporation | 650-856-4800 | Financial Services |
| Cody Anderson Wasney Architects, Inc. | 650-328-1818 | Architects |
| Coldwell Banker Commercial-Wilbur Properties | 650-847-4347 | Real Estate |
| Coldwell Banker Residential Brokerage, Palo Alto Downtown | 650-752-0700 | Real Estate |
| Coldwell Banker Residential Brokerage, Palo Alto Midtown | 650-328-5211 | Real Estate |
| Columbia Printing | 408-774-1300 | Business to Business Resources |
| Comcast | 650-289-6730 | Telecommunications |
| Comerica Bank | 650-462-6134 | Business Referral Network Members |
| Comfort Inn Palo Alto / Stanford Area | 650-493-3141 | Hotels & Motels |
| Common Ground Organic Garden Supply and Education Center | 650-493-6072 | Associations, Clubs & Organizations |
| Communications & Power Ind. | 650-846-3166 | Technology |
| Community Working Group, Inc. | 650-299-8700 | Community & Human Services |
| Conference Consultants | 650-324-1653 | Event Planning & Management |
| Congdon & Crome, Inc. | 650-326-1650 | Stationers |
| Terry Conroy | (650) 322-4333 | Clothing |
| Cool Cafe at the Cantor Art Center | 650-725-4758 | Restaurants, Cafes & Catering |
| Cooley Godward LLP | 650-843-5000 | Attorneys |
| Copy Factory | 650-856-2020 | Business to Business Resources |
| Cornish & Carey | 650-688-8519 | Real Estate |
| Coronet Motel | 650-326-1081 | Hotels & Motels |
| The Country Inn Motel | 650-948-9154 | Hotels & Motels |
| County Supervisor, Liz Kniss | 408-299-5050 | Community & Government |
| Coupa Cafe | 650-322-6872 | Restaurants, Cafes & Catering |
| Courtyard by Marriott Palo Alto - Los Altos | 650-941-9900 | Hotels & Motels |
| Cowper Inn | 650-327-4475 | Hotels & Motels |
| Creative X-Pressions | 650-596-9170 | Marketing and Communications |
| Creekside Inn Palo Alto | 650-493-2411 | Business Referral Network Members |
| Crist, Schulz, Biorn & Shepherd | 650-321-5000 | Attorneys |
| Crow Digital Media | 650-213-6569 | Marketing and Communications |
| Crown Worldwide Moving & Storage | 510-614-4129 | Moving & Storage |
| Culture, LLC | 650-324-0440 | Food & Beverage |
