| Name | Deductibility Code |
| Barking Holler Animal Sanctuary Inc. | -- |
| Dickerson Community Association | -- |
| Hyattstown Cemetery Assoc Inc. | 6 |
| Landscape and Nature Discoveries Inc. | -- |
| Mid-Atlantic Exotic Pest Plant Council Inc. | -- |
| Speakout Foundation | -- |
| Stronghold Incorporated | 3 |
| Sugarloaf Citizens Association Inc. | -- |