| Name | Deductibility Code |
| Access Senior Housing of Willington Inc. | -- |
| Friends of the Willington Public Library | -- |
| Hartford Smith College Club | -- |
| J C M G T Fund | -- |
| Lao Lane Xang Temple of Connecticut | -- |
| Odin Village Inc. | -- |
| Reach Homes Inc. | -- |
| Wam United | -- |
| Willington Baptist Society Inc. | -- |
| Willington Fire Dept No 1 Inc. | -- |
| Willington Hill Fire Department Inc. | -- |
| Willington Historical Society Incorporated | -- |
| Willington Junior League Inc. | -- |
| Willington Nursery Cooperative Inc. | -- |
| Willington Seniors Inc. | -- |
| World Transhumanist Association Inc. | -- |