| Name | Deductibility Code |
| Celebrate Effingham | -- |
| Effingham Elementary School Parent-Teacher Organization | -- |
| Effingham Historical Society | -- |
| Effingham Preservation Society | -- |
| Friends of the Effingham Library | -- |
| Joshua Tree Christian Youth Ministries | 3 |
| South Effingham and West Parsonsfield Citizens Organization | -- |
| The Lords Hill Meeting House | -- |