| Name | Deductibility Code |
| Accept Inc. | -- |
| Art of Charity Foundation | -- |
| Ben Hogan Scholarship Fund Inc. | -- |
| Bryce Family Foundation | 4 |
| Cape Cod Maritime Traditions Inc. | 4 |
| Cape Cod Opera Incorporation | -- |
| Cape Cod Potters Inc. | -- |
| Chatham Athletic Association Inc. | -- |
| Chatham Athletic Booster Club Inc. | -- |
| Chatham Conservation Foundation Inc. | -- |
| Chatham Drama Guild Inc. | -- |
| Chatham Fire Association Inc. | 6 |
| Chatham Historical Society Inc. | -- |
| Chatham Music Club | -- |
| Chatham Rotary Foundation | -- |
| Chatham Youth Hockey Inc. | -- |
| Creative Arts Center in Chatham Inc. | -- |
| Education and Resources Group Inc. | -- |
| First Night Chatham Inc. | -- |
| Friend of Pleasant Bay Inc. | -- |
| Friends of Chatham Waterways Inc. | -- |
| Friends of Monomoy Inc. | -- |
| Friends of Monomoy Theatre Inc. | -- |
| Friends of the Chatham Council on Aging Inc. | -- |
| Friends of the Eldredge Public Library Inc. | -- |
| Friends of Trees Inc. | -- |
| Hearts That Care Inc. | 4 |
| Jason Stone Family Foundation | 4 |
| Kappa Delta Phi Educational Foundation | -- |
| Meier Family Foundation Ltd. | 4 |
| Monomy Comunity Services | -- |
| Mountainwerks Accessibility Corporation | -- |
| Old Village Associaton Inc. | -- |
| Seedling Foundation Inc. | 4 |
| Stage Harbor Sailing School Inc. | -- |
| Studio 878 Trust | -- |
| The Chatham Citizens Scholarship Trust Fund | 4 |
| The Chatham Initarian Universalist | -- |
| The Pals for Life Foundation | -- |
| Women of Fishing Families | -- |