| Name | Deductibility Code |
| African American Heritage Society of Charles County Inc. | -- |
| Charles County Fair Inc. | -- |
| Charles County Nursing Home Inc. | -- |
| Charles County Rescue Squad Inc. | -- |
| Charles County Rotary Foundation Incorporated | -- |
| Chemical People of Charles County Inc. | 4 |
| Dentsville Volunteer Ems and Auxillary Inc. | -- |
| Francis Reidy Scholarship Fund Inc. | 4 |
| Historical Society of Charles County Inc. | -- |
| Hospice of Charles County Incorporated | -- |
| La Plata Lions Club Foundation Inc. | -- |
| La Plata Volunteer Fire Department Inc. | 6 |
| Real Hope Learning Initiative Cdc | -- |
| Saving Grace Ministries | -- |
| Senior Services of Charles County | -- |