| Name | Deductibility Code |
| Arc of Quinebaug Valley Inc. | -- |
| Arrowood Blankenship Farmer Miller Killingly High School Class 1986 | -- |
| Benjamin T Desaulnier Student- athlete Scholarship Fund Inc. | -- |
| Caring Families Pregnancy Services Inc. | -- |
| Community Kitchen of Northeastern Connecticut Inc. | -- |
| Danielson Lions Charities Inc. | -- |
| Deary Memorial Foundation | -- |
| Eastern Connecticut Housing Organization Inc. | -- |
| Friends of Killingly Athletics | -- |
| Friends of Killinglys Public Library | -- |
| H H Ellis Tech Booster Club Parent Faculty Organization | -- |
| Holy Trinity Endowment Foundation Inc. | 4 |
| Killingly Brooklyn Ambulance Corps Inc. | -- |
| Killingly Historical and Genealogical Society Inc. | -- |
| Killingly-Brooklyn Cultural Development Foundation Inc. | -- |
| Killingly-Brooklyn Midget Football Association Incorporated | -- |
| National Society of the Descendants of Textile Workers of America | -- |
| Quinebaug Valley Community College Foundation Inc. | -- |
| Quinebaug Valley Emergency Comm Inc. | -- |
| Quinebaug Valley Plastics Institute Inc. | -- |
| Sisters of the Adoration Corp | -- |
| Special Days for Special Needs | -- |
| Spirol International Charitable Foundation Inc. | 4 |
| The Last Green Valley Inc. | -- |
| Westcott-Wilcox Old Peoples Home | -- |
| Westfield Cemetery Association Inc. | 6 |