| Name | Deductibility Code |
| Algonquian Intertribal Village Inc. | 4 |
| Annwn Foundation Inc. | -- |
| Cardinal Brook Trust | 4 |
| Cattel Andriski Foundation Inc. | 4 |
| Institute for Environmental Awareness Inc. | -- |
| Petersham Craft Center | -- |
| Petersham Historical Society Incorporated | 4 |
| Petersham Memorial Library | -- |
| Petersham Montessori School Inc. | -- |
| Sacred Earth Network Inc. | -- |