| Name | Deductibility Code |
| Alternative Services Inc. of Connecticut | -- |
| Bacon Academy Alumni Association Inc. | 4 |
| Bo-Dyn Bobsled Project Inc. | -- |
| Christian Life Chapel | -- |
| Clare Nsenga Foundation | -- |
| Colchester Alternative School-Age Total Learning Experience Inc. | -- |
| Colchester Concerned Citizens Inc. | 4 |
| Colchester Cooperative Nursery School Inc. | -- |
| Colchester Cooperative Parent- teacher Organization | -- |
| Colchester Cougars Midget Football Inc. | -- |
| Colchester Emergency Communications Inc. | -- |
| Colchester Hayward Volunteer Fire Company | -- |
| Colchester Historical Society Incorporated | -- |
| Colchester Land Trust Inc. | -- |
| Colchester Learning Foundation Inc. | -- |
| Colchester Lions Charities Inc. | -- |
| Colchester Youth Lacrosse Inc. | -- |
| Colchester Youth Soccer | -- |
| Colchester Youth Wrestling Inc. | -- |
| Connecticut Habilitation Centers | 4 |
| Cragin Memorial Library | -- |
| Dayne Lecy Ministries Inc. | -- |
| Emerson Theater Collaborative Inc. | -- |
| Friends of Cragin Library | -- |
| Friends of Football Bacon Academy High School | -- |
| Great Cat Welfare Society of the Northeast | -- |
| Gungywamp Society Inc. | -- |
| Helping Paws Inc. | -- |
| International Family Worship Center | -- |
| Laps of Hope Inc. | -- |
| Linwood Cemetery Assoc Inc. | 6 |
| Maltempo Family Charitable Foundation Inc. | 4 |
| Music & Miracles Inc. | -- |
| New England Rbgy Scholarship Camp Association Inc. | -- |
| Nova Roma | -- |
| Rotary Club of Colchester Foundation Inc. | -- |
| Task-9 Inc. | -- |
| Team Mad Inc. | -- |
| The Caring Community of Connecticut Inc. | -- |
| The Carla and Stephen Schwartz Family Foundation Inc. | 4 |
| The Cody Camp Memorial Field Foundation Inc. | -- |
| Vine Training and Worship Center Inc. | -- |
| Westchester Center Cemetery Association Inc. | 6 |