| Name | Deductibility Code |
| Al Leiter Little League of Oyster Bay Inc. | -- |
| Amanda Styles Cirelli Foundation for Cancer Research Inc. | -- |
| Anand Foundation Inc. | -- |
| Atlantic Steamer Fire Co No 1 Inc. | 6 |
| Bahnik Foundation Inc. | 4 |
| Borgia Family Foundation Inc. | 4 |
| Boys & Girls Club of Oyster Bay- east Norwich | -- |
| Cedar Swamp Historical Society | -- |
| Center for Marine Education & Recreation at Oyster Bay Inc. | -- |
| Centre Island Conservancy Inc. | -- |
| Centro Cultural Hispano De Oyster Bay East Norwich | -- |
| Charles & Rita Baten Foundation Inc. | 4 |
| Christee Oyster Sloop Preservation Corporation | -- |
| Committee for the Renovation and Restoration of the Oyster Bay Audi | -- |
| Community Foundation of Oyster Bay Inc. | -- |
| Divine Power Inc. | -- |
| Dolan Family Foundation Corp | 4 |
| Doubleday Babcock Senior Center Inc. | -- |
| East Woods School Inc. | -- |
| Friends of Harmony Heights Inc. | -- |
| Friends of Raynham Hall Inc. | -- |
| Friends of the Arts Inc. | -- |
| Friends of the Bay Inc. | -- |
| Gloria M Barron Foundation | 4 |
| Harmony Heights Inc. | -- |
| Homes for Autistic Children & Adults Inc. | -- |
| Iacca Inc. | -- |
| Korean American Public Affairs Committee Inc. | -- |
| Korean Association of Long Island Inc. | -- |
| Learning Tree Nursery Inc. | -- |
| Long Island Chapter of the American Rock Garden Society Inc. | -- |
| Long Island Native American Indian Alliance | -- |
| Matinecock Masonic Historical Society | -- |
| Melillo Foundation | -- |
| Mixed Breeds in Need Inc. | -- |
| Myles Wittenstein Charitable Foundation Inc. | 4 |
| Nassau Coalition of Chemical Dependency Providers Incorporated | -- |
| North Shore Preservation Society | -- |
| Oyster Bay Charitable Fund | -- |
| Oyster Bay Council Charitable Foundation | 4 |
| Oyster Bay Cove Land Trust Inc. | -- |
| Oyster Bay East Norwich Soccer Club | -- |
| Oyster Bay Historical Society | -- |
| Oyster Bay Jewish Center | -- |
| Oyster Bay Jewish Center | -- |
| Oyster Bay Lions Club Foundation Inc. | -- |
| Oyster Bay Main Street Association | -- |
| Oyster Bay Rotary Student Loan Foundation | -- |
| Peer Pals | -- |
| Planting Fields Foundation | -- |
| Project D O C C Inc. | -- |
| Quinn Family Foundation | 4 |
| Shannon Briggs Memorial Scholarship Fund Inc. | 4 |
| Society of Columbia Graduates | -- |
| Steven L Newman Support Foundation | 4 |
| Suffolk Institute of Psychotherapy & Psychoanalysis | -- |
| The Anne and John Tatta Family Foundation Inc. | 4 |
| The Oyster Bay Railroad Museum | -- |
| The Oyster Bay Sailing Foundation Inc. | -- |
| The Scoroposki Foundation | 4 |
| The Underhill Society of America Education & Publishing Fund | 4 |
| Theodore Roosevelt Assn | -- |
| Theodore Roosevelt Sanctuary Inc. | -- |
| Townsend Society of America | 3 |
| Tr Statue Fund Inc. | -- |
| Visiting Nurse Association of Oyster Bay and Glen Cove Inc. | -- |
| Volunteer & Exempt Firemens Benevolent Association of Oyster B | 6 |
| Youngs Memorial Cemetery Association | 6 |
| Youth & Family Counseling Agency of Oyster Bay-East Norwich Inc. | -- |