| Name | Deductibility Code |
| Adapt Foundation | -- |
| Addario Lung Cancer Medical Institute | -- |
| Advocates for Accessible Recreation Inc. | -- |
| American Buddha Inc. | -- |
| American Technology Initiative for Aerospace Research Technology | -- |
| Americas River Communities Inc. | -- |
| Arbor Foundation | 4 |
| Bay Area Educational Theater Company | -- |
| Bellafattos Boxing & Fitness Academy Inc. | -- |
| Bonnie J Addario A Breath Away From the Cure Foundation | -- |
| California Pilots Association | 1 |
| Christensen Family Foundation | 4 |
| Community Action Agency of San Mateo Co Inc. | -- |
| Community Christian Fellowship | -- |
| Community Empowerment and Opportunity Center | -- |
| Deanna Maran Foundation | -- |
| Desbrisay Sigler Family Foundation | 4 |
| Dorothy K Fischer Veterans Assistance Foundation | 3 |
| Fremont Opera Inc. | -- |
| Friends of the San Carlos Library | -- |
| Friends of the San Carlos Senior Center Inc. | -- |
| Global Alliance for Preserving the History of World War II in Asia | -- |
| Guru Shradha | -- |
| Hiller Aviation Institute | -- |
| Homeless Cat Network | -- |
| Iglesia Bautista Fundamental Buenas Nuevas | -- |
| Industrial Emergency Council | -- |
| Joanna De Angelis Spiritist Society | -- |
| Kimya Institute for Captive Wild Animal Welfare | -- |
| Konkani Charitable Fund Inc. | -- |
| Lawrence Weissberg Foundation | 4 |
| Love Inc. San Mateo County | -- |
| Martial Arts Instructors USA | -- |
| Mickeys Place | -- |
| Mid-Peninsula Vineyard Christian Church | -- |
| Miller Institute for Learning With Technology | -- |
| Moseley Foundation | 4 |
| Mountain View Los Altos Soccer Club | -- |
| Narrow Gauge Preservation Foundation | -- |
| Nektar Employees Foundation | 4 |
| Off the Glass Basketball Inc. | -- |
| On-Site Dental Care Foundation Inc. | -- |
| Operation Health Aid | -- |
| Operation Top Hat | -- |
| Ophoenix Public Benefit Corporation | -- |
| Palo Alto Swim Club | -- |
| Pampanito Memorial and Museum Fund | -- |
| Peninsula Family Connections | -- |
| Peninsula Interfaith Action | -- |
| Psychogenic Research | -- |
| Red-Car-Bel Auxiliary | -- |
| Rotary Club of San Carlos Community Service Inc. | -- |
| Ruby Glass Private Foundation | 4 |
| Sacred World | 4 |
| San Carlos Charter Learning Center Fundraising Association | -- |
| San Carlos Childrens Theatre Inc. | -- |
| San Carlos Colt-Pony Baseball Inc. | -- |
| San Carlos Educational Foundation | -- |
| San Carlos Police Activities League Inc. | -- |
| San Carlos Sister City Association Inc. | -- |
| San Carlos Sliders Softball Association | 4 |
| San Carlos Together Inc. | -- |
| San Carlos Youth Softball Association Inc. | -- |
| San Francisco Samoyed Rescue Inc. | -- |
| San Mateo County Women Lawyers Section Educational Foundation | 4 |
| Sequoia Parents Nursery School Inc. | -- |
| Sundberg Family Foundation | 4 |
| Susie and Gideon Yu Foundation | 4 |
| Tae Foundation | 4 |
| The Cardiac Transplant Support | -- |
| The Peninsula Figure Skating Club Inc. | -- |
| The San Carlos Parks & Recreation Foundation Inc. | -- |
| The Schuyler Institute for Worship and the Arts | 3 |
| The W F and Marie A Batton Foundation | 4 |
| Training and Health Education Center for Youth | -- |
| True Learning Center Inc. | -- |
| Village Enterprise Fund Inc. | -- |
| Vocare National Inc. | -- |
| Wayne T Kennedy and Lorelei F Rockwell Family Foundation | 4 |
| West Coast Songwriters Association | -- |
| Youth and Family Enrichment Services | -- |