| Name | Deductibility Code |
| International Association of Ministries Inc. | 1 |
| Lake Mills Ambulance Service | -- |
| Lake Mills Area Historical Society | -- |
| Lake Mills Area Ministerial Association | -- |
| Lake Mills Entertainment Inc. | -- |
| Lake Mills Family Center | -- |
| Lake Mills Fire Fighters Association | -- |
| Lake Mills Foundation for Community Improvements Inc. | -- |
| Lake Mills Senior Citizen Club | -- |
| New Hope Tabernacle | -- |
| Norwegian American Immigrant Family Monument Commission | -- |