| Name | Deductibility Code |
| Committee for A Green South Fork | -- |
| Dorothy Babcock Family Charitable Foundation | 4 |
| Earthmatters Inc. | -- |
| Jc for Jd | -- |
| Ola of Eastern Long Island Inc. | -- |
| Prospect Media Inc. | 4 |
| Terranova Inc. | 4 |
| The Dorothy and Dennis Sheahan Charitable Family Foundation | 4 |
| The Jewish Cemetery Association of Sag Harbor | 6 |
| Water Mill Community Club Educational Unit | -- |
| Water Mill Museum | -- |
| Water Mill Museum | -- |
| Water Mill Village Improvement Association Inc. | -- |
| Worldwide Mrdia & Vocal Communication Inc. | 4 |