| Name | Deductibility Code |
| Great Turtle Festivals | -- |
| Mackinac Arts Council | -- |
| Mackinac Horsemens Associations | -- |
| Mackinac Island Bible Church | -- |
| Mackinac Island Community Foundation | -- |
| Mackinac Island Housing Corporation | -- |
| Mackinac Island Medical Center Inc. | -- |
| Mackinac Island Preservation Association | -- |
| Mackinac Island Recreational Development Inc. | -- |
| Wawashkamo Restoration and Preservation Fund | -- |