| Name | Deductibility Code |
| Albert and Bessie Warner Fund | 4 |
| Authentic Design Experience Ltd. | -- |
| Bay Street Theatre Festival Inc. | -- |
| Breakwater Yacht Club | -- |
| Cancer Simplified | -- |
| Clayart Guild of the Hamptons Inc. | -- |
| Committee for Sag Harbors Old Burying Ground | 4 |
| Cover Me With Love | -- |
| East End Aids Wellness Project Inc. | -- |
| East Hampton Artists Writers Softball Game Inc. | -- |
| East Hampton Catastrophic Illness Fund Inc. | -- |
| Eastville Community Historical Society | -- |
| Envision Environmental Media Center | -- |
| Fighting Chance Inc. | -- |
| Freud Foundation US | -- |
| Friends of Journalists for Human Rights Inc. | -- |
| Friends of the John Jermain Library Inc. | -- |
| Gardner Cowles III Charitable Foundation | 4 |
| Gertrude Kaufman Silver Foundation | 4 |
| Goat on A Boat Inc. | -- |
| Grand Vista Ministries Inc. | -- |
| Grayling Foundation | 4 |
| Home Bible Study Ministry Inc. | -- |
| Hybrid Art Centres Inc. | -- |
| Jazz Inspired Inc. | 4 |
| John Jermain Future Fund | -- |
| John Jermain Memorial Library | -- |
| Ladies Village Improvement Society of Sag Harbor | -- |
| Lance Corporal Jordan C Haerter Memorial Fund Inc. | -- |
| North Haven Historical Cemetery Association Inc. | 4 |
| Ocean Zendo Inc. | -- |
| Old Whalers Church Restoration Campaign Inc. | -- |
| Park and Recreation Association of Sag Harbor New York Inc. | -- |
| Playwrights Kitchen Ensemble Theatre Inc. | -- |
| Sag Harbor Charity Cup Challenge Inc. | -- |
| Sag Harbor Community Food Pantry Inc. | -- |
| Sag Harbor Community Rowing Limited | -- |
| Sag Harbor Historical Society | -- |
| Sag Harbor Lions Club Charitable Trust | -- |
| Sag Harbor Tree Fund | -- |
| Sag Harbor Volunteer Ambulance Corps | -- |
| Sag Harbor Whaling & Historical Museum | -- |
| Sag Harbor Youth Center Inc. | -- |
| Sag Harbor Youth Committee Inc. | -- |
| Savant Garde Institute Ltd. | -- |
| Sony and Maurice Schotland Foundation Inc. | 4 |
| South Fork Groundwater Task Force Inc. | -- |
| Spokespeople of Eastern Long Island Inc. | -- |
| Steele Foundation | 4 |
| Temple Adas Israel of Sag Harbor Ny | -- |
| Uber House Foundation Inc. | -- |