| Name | Deductibility Code |
| Animal Neutering for Orphans and the Neglected | -- |
| As He is Ministries | 4 |
| Central Burying Ground Association | 6 |
| Colebrook Associates Inc. | -- |
| Colebrook Consolidated School Parent Teacher Organization Inc. | -- |
| Colebrook Historical Society Incorporated | -- |
| Colebrook Land Conservancy Inc. | -- |
| Colebrook Preservation Society Inc. | -- |