| Name | Deductibility Code |
| Bcats-Mhs Alumni Association | -- |
| Maddock Community 55 Club Inc. | -- |
| Maddock Community Center Corp | -- |
| Maddock Community Historical Society | -- |
| Maddock Economic Development Inc. | -- |
| Maddock Memorial Home | -- |
| Moeller Home Inc. | -- |
| Psalm One Inc. | -- |
| Viking Lutheran Cemetery Corporation of S Viking Township | 6 |