| Name | Deductibility Code |
| Abundant Life Community Church | -- |
| Access Agency Inc. | -- |
| Access Senior Housing of Franklin Inc. | -- |
| Birthright of Windham Inc. | -- |
| Card Home for the Aged Inc. | 3 |
| Center for Medicare Advocacy Inc. | -- |
| Community Foundation of the Tri-County Area Inc. | -- |
| Community Land Trust of Windham Inc. | -- |
| Community Prevention and Addiction Services Inc. | -- |
| Companions & Homemakers by Nancy & Hazel Inc. | -- |
| Connecticut Eastern Chapt National Railway Historical Society | -- |
| Covenant Soup Kitchen Inc. | -- |
| Curbstone Press | -- |
| Eastern Connecticut State College Alumni Association | -- |
| Eastern Connecticut Training School for Firemen | -- |
| Ecsu Foundation Inc. | -- |
| Foundation for Campus Ministry Inc. | -- |
| Fount of Salvation Missionary Church Inc. | -- |
| Friends of Perception Programs Inc. | -- |
| Garden Club of Windham | -- |
| Generations Family Health Center Inc. | -- |
| Growing Stronger Inc. | -- |
| Hatch Hospital Corporation | -- |
| Iglesia Cristo A Las Puertas | -- |
| James C Devivo Educational Foundation Inc. | -- |
| Lester and Phyllis Foster Foundation | 4 |
| Little Angels Program | -- |
| McSweeney Senior Center | -- |
| Northeast Connecticut Economic Alliance Inc. | -- |
| Perception Programs Inc. | -- |
| Polish National Youth Baseball Foundation | -- |
| Project Genesis Incorporated | -- |
| Sexual Assault Crisis Center of Eastern Connecticut Inc. | -- |
| Shalom Chaverim | -- |
| Si Financial Group Foundation Inc. | 4 |
| Stanley Chapel A M E Zion Church | -- |
| United Assembly Christian Church John 8 32 Inc. | -- |
| Waim Windham Area Interfaith Ministry | -- |
| Willimantic Renaissance Inc. | -- |
| Willimantic Victorian Neighborhood Association Inc. | -- |
| Willimantic Whitewater Partnership Inc. | -- |
| Windam Hospital Foundation Inc. | -- |
| Windham Area Arts Collaborative | -- |
| Windham Community Memorial Hospital Inc. | -- |
| Windham Community Memorial Hospital Inc. Womens Aux | -- |
| Windham High School Booster Club Inc. | -- |
| Windham Historical Society Incorporated | -- |
| Windham Region No Freeze Project Inc. | -- |
| Windham Regional Arts Council Inc. | -- |
| Windham Regional Community Council Inc. | -- |
| Windham Textile and History Museum Inc. | -- |
| Windham Theatre Guild Inc. | -- |
| Windham Youth Football and Cheerleading | -- |
| Windham/Willimantic Child Care and Family Development Programs Inc. | -- |
| Young Mens Christian Association Willimantic | -- |