| Name | Deductibility Code |
| Friends of Mercer Public Library | -- |
| Manito Art League | -- |
| Mercer Area Food Pantry Inc. | -- |
| Mercer Area Historical Society | -- |
| Mercer Cross Country Ski Club Inc. | -- |
| Mercer Education Foundation Inc. | -- |
| Mercer Lake Association of Iron County Wisonsin Inc. | -- |
| Mercer Loons Inc. | -- |
| Northwoods Wildlife and Wetlands Club Ltd. | -- |
| Pine Forest Ventures | -- |