| Name | Deductibility Code |
| Able to Aviation Inc. | -- |
| Above C Level Foundation | -- |
| Art Without Walls Inc. | -- |
| Atlantic Wind Symphony Inc. | -- |
| Blue House Foundation Inc. | -- |
| Bringing in the Sand Fund Inc. | -- |
| Candle in the Darkness Foundation | -- |
| Christopher D O Connell Memorial Scholarship Fd | -- |
| Coastal Research and Education Society of Long Island Inc. | -- |
| Community Ambulance Company Inc. | -- |
| Friends of Islip Town Firefighters Inc. | -- |
| Friends of Long Island Wireless History | -- |
| Friends of Sayville Library Inc. | -- |
| Gospel Community Church | -- |
| Grace Chapel Inc. | -- |
| Great South Bay Audubon Society Inc. | -- |
| Greater Sayville Food Pantry Inc. | -- |
| Jackie Sayegh Duggan Charitable Foundation Inc. | -- |
| Kenneth F Stein Memorial Scholarship Foundation Inc. | -- |
| Leeway School | -- |
| Living Hope Ministries | -- |
| Long Island Blue Jays Jr Drum and Bugle Corps Inc. | -- |
| Mitchell Cangelosi Scholarship Fund Inc. | -- |
| Mothers Center of the South Shore Inc. | -- |
| Omega Institute Inc. | -- |
| Pines Animal Welfare Society Inc. | -- |
| Reflective Garden at the Common Ground Inc. | -- |
| Ricki Fund | -- |
| Sayville Advocacy for Initiatives in Learning Corporation | -- |
| Sayville Cabinet for the Sick Inc. | -- |
| Sayville Fire Department | 6 |
| Sayville Football Booster Club | -- |
| Sayville Historical Society | -- |
| Sayville Kiwanis Club Foundation Inc. | -- |
| Sayville Village Improvement Society | -- |
| Sayville Yacht Club Sailing Foundation Inc. | -- |
| Sayville Youth Football | -- |
| Scwachman-Diamond Project Ltd. | -- |
| Silver Broom Ministeries | -- |
| Sky Education & World Community Center Inc. | -- |
| South Shore Boys Club Inc. | -- |
| South Shore Community Sports Center Inc. | -- |
| Special Friends With Down Syndrome Inc. | -- |
| The Jonathan Matthew Gengler Scholarship Fund | -- |
| The Keith Ryan Nintzel Scholarship Foundation Inc. | -- |
| Tifereth Israel Rabbinical Yeshiva Inc. | -- |
| Union Cemetery Association of Sayville Inc. | 6 |
| Veterans Service Organization for the Town of Islip Inc. | -- |