| Name | Deductibility Code |
| A Running Start Foundation | -- |
| Andrew Sabin Family Foundation | 4 |
| Artists Alliance of East Hampton Inc. | -- |
| Azuero Earth Project Inc. | -- |
| Boswick-Cambre Family Foundation | 4 |
| C Jay Moorhead Foundation | 4 |
| Diogenes Charitable Foundation Tr | 4 |
| East End Ice Inc. | -- |
| East Hampton Community Revolving Loan Fund Inc. | -- |
| East Hampton Day Care Center Inc. | -- |
| East Hampton Food Pantry Inc. | -- |
| East Hampton Healthcare Foundation | -- |
| East Hampton Historical Society Inc. | -- |
| East Hampton Library | -- |
| East Hampton Meals on Wheels Inc. | -- |
| East Hampton Neighborhood House Association Inc. | -- |
| Eastern Life Films Inc. | -- |
| Educational Alternatives Inc. | -- |
| Eeco Farm Ltd. | -- |
| Ellen Frank Illumination Arts Foundation | -- |
| Elsas Ark Inc. | -- |
| Evan Frankel Foundation | 4 |
| Frances Alenikoff Dance Theatre Inc. | -- |
| Friends of Gildas Club of the South Fork Inc. | -- |
| Friends of Guild Hall | -- |
| Garden Club of East Hampton Inc. | -- |
| Greater East Hampton Education Foundation Inc. | -- |
| Greek Museum | -- |
| Guild Hall of East Hampton Inc. | -- |
| Hampton Lifeguard Association Inc. | -- |
| Hamptons International Film Festival Inc. | -- |
| Harvey Karp Foundation | 4 |
| Hook Pond Associates Inc. | -- |
| Hoops for Hope Inc. | -- |
| Jacobson Center for the Performing Arts Ltd. | -- |
| Jewish Center of the Hamptons | -- |
| Kendall Madison Foundation | -- |
| Ladies Village Improvement Society of East Hampton Long Island Inc. | -- |
| Lassaw Foundaton Inc. | 4 |
| Longhouse Reserve | -- |
| Maryam and Hervey Seley Foundation | 4 |
| Master Sports Association | -- |
| Mollie Zweig Foundation | 4 |
| Montauk Observatory | -- |
| Oddfellows Playhouse Inc. | -- |
| Olive Cheritree Inc. | -- |
| Pazer Productions Inc. | -- |
| Pediatric Dental Fund of the Hamptons Inc. | -- |
| People for the End of Animal Cruelty and Exploitation | -- |
| Project Most Inc. | -- |
| Pushcart Prize Fellowships Inc. | -- |
| Randy Price Memorial Fund Inc. | -- |
| Renewable Energy Long Island Inc. | -- |
| Retreat Inc. | -- |
| Ross School | -- |
| Save A Dog A Day Inc. | -- |
| Simple Works Inc. | -- |
| South Fork Community Health Initiative Inc. | -- |
| Springs Community Theater Inc. | -- |
| Springs Historical Society | -- |
| Springs Youth Association Inc. | -- |
| Stages A Childrens Theater Workshop Inc. | -- |
| Standing for Truth About Radiation | -- |
| Stark Family Charitable Foundation | 4 |
| Stephen Robert Foundation | 4 |
| The Clamshell Foundation Inc. C/O Rosetti Perchik | -- |
| The Frank Collins Caddie Scholarship Trust | -- |
| The Ruder Family Foundation | 4 |
| Thomas Moran Trust Inc. | -- |
| Village Preservation Society Inc. | -- |
| Whalebone Housing Development Fund Company Inc. | -- |
| Windmill Housing Development Fund Company Inc. | -- |