| Name | Deductibility Code |
| D S D Scholarship Fund | -- |
| Eastham Conservation Foundation Inc. | 4 |
| Eastham Elementary Parent Group | -- |
| Eastham Firemens Association Inc. | 6 |
| Eastham Historical Society Inc. | -- |
| Friends of Eastham Recreation Inc. | -- |
| Friends of the Eastham 1651 Arboretum | -- |
| Friends of the Eastham Public Library Inc. | -- |
| Nauset Fellowship Inc. | -- |
| Nauset Light Preservation Society Inc. | -- |
| Outer Cape Health Services Inc. | -- |
| Police Association of Eastham Inc. | -- |
| Tern Foundation Inc. | 4 |
| Wellfleet Shellfish Promotion and Tasting Inc. | -- |
| Wild Care Inc. | -- |