| Name | Deductibility Code |
| African Orphans Foundation | -- |
| Allan H Rappaport Charitable Foundation Inc. | 4 |
| Angel Island Association | -- |
| Association for Humanistic Psychology | -- |
| Belvedere-Tiburon Landmarks Society | -- |
| California Health Research Foundation | -- |
| California Parents for Educational Choice Foundation | 4 |
| California Society of Plastic Surgeons Alliance | -- |
| California Study Inc. | -- |
| Canobie Films Foundation Incorporated | 3 |
| Cat Caring Connection | -- |
| Charity Enablers Foundation | 4 |
| Co-Operative Opportunity for Online Learning | -- |
| Congregation Kol Shofar | -- |
| Constance L Heldman Foundation | 4 |
| Educational Enhancement | -- |
| Felidae Conservation Fund | -- |
| Frankie Poulos Foundation | -- |
| Fred Gellert Family Foundation | 4 |
| Fund for Humanity | 4 |
| Future Educational Films Inc. | -- |
| Gambs Family Foundation | 4 |
| Geothermal Education Office | -- |
| Girls on the Run Marin County | 4 |
| Global Vision Alliance | 4 |
| Grants for Good Foundation | -- |
| Hilltop Group Charitable Foundation | 4 |
| Interactive Multisensory Learning Institute | -- |
| It History Society | 4 |
| Jack Heimann Family Foundation Inc. | 4 |
| Juvenis | -- |
| Kahan Family Foundation | 4 |
| Kids Helping Kids Inc. | -- |
| Margot Macdougall Family Foundation | 4 |
| Marin Cat Connection | -- |
| Marin Foundation of Friends of Arequipa | -- |
| Marin Music Conservatory | -- |
| Melanoma Research Institute | -- |
| National Housing Preservation Corporation | 4 |
| National Society Sons & Daughters of the Pilgrims | 1 |
| Netgain Foundation | -- |
| New Rhythms Foundation | 4 |
| Nunca Desista | -- |
| One Giant Leap Foundation | -- |
| Paradise Harbor Boating Association Inc. | -- |
| Phillips-Morrison Institute of California | 4 |
| Presidential Families of America | 4 |
| Reed Schools Foundation | -- |
| Robert W Morey and Maura Burke Morey Charitable Trust | 4 |
| Rotary Club of Tiburon Sunset Foundation | -- |
| Rotary Club of Tiburon-Belvedere Foundation | -- |
| Ryder Foundation | -- |
| Sacca Foundation | -- |
| Sage Femme Inc. | -- |
| San Francisco Bay Oceanic Crew Group | -- |
| San Francisco Chapter Western Pension Conference Education Fund | -- |
| Seidel Family Foundation for Better Vision Inc. | 4 |
| Shirley T Tartak Foundation | 4 |
| Skywords Family Foundation Inc. A New Corporation | 4 |
| Special Education Coalition of Marin | -- |
| Terwilliger Nature Education Legacy | -- |
| The Belvedere Tiburon Child Care Center | -- |
| The Frost Foundation | 4 |
| The Hilarita - Tiburon Ecumenical Association | -- |
| The Institute for Encouraging Christian Lay Ministry Inc. | -- |
| The Walter Bridge Foundation | 4 |
| Tiburon International Film Festival | -- |
| Tiburon Peninsula Foundation | -- |
| Tiburon Peninsula Soccer League Inc. | -- |
| Tiburon Salmon Institute | -- |
| Tiburon Thrift Shop | -- |
| Tiburon Volunteer Fire Department | 6 |
| University of the Universe | -- |
| Urquhart Memorial Foundation | -- |
| Vintners Club | -- |
| World Without Borders | -- |
| Zteam Cycling Inc. | -- |