| Name | Deductibility Code |
| Agency on Aging Apartments Kilmarnock Inc. | -- |
| Agency on Aging Apartments Montross Inc. | -- |
| Bay Aging | -- |
| Bay Aging Apartment Jcc Inc. | -- |
| Bay Aging Apartments Colonial Beach Inc. | -- |
| Bay Aging Apartments Gloucester Inc. | -- |
| Bay Aging Apartments Middlesex Inc. | -- |
| Bay Aging Apartments West Point Inc. | -- |
| Bay Aging Apartments Westmoreland Inc. | -- |
| Bay Aging Foundation | -- |
| Central Middlesex Volunteer Rescue Squad Inc. | -- |
| Chesapeake Bay Housing Inc. | -- |
| Christmas Friends Inc. | -- |
| Hospice Support Care of Middlesex County Inc. | -- |
| Jacobs Ladder Inc. | -- |
| Middlesex Art Guild Inc. | -- |
| Middlesex County Public Library Inc. | -- |
| Middlesex County Womans Club Inc. | -- |
| Middlesex Kiwanis Foundation | -- |
| Middlesex Prevention Coalition | -- |
| Middlesex Volunteer Fire Department | -- |
| Ripib Llc | 6 |
| Trinity Evangelical Lutheran Church | -- |
| Urbanna Oyster Festival Foundation | -- |
| Urbanna Swim Team Inc. | 4 |