| Name | Deductibility Code |
| Allen H and Nydia Meyers Foundation | 4 |
| Aquaculture Research Corporation | 3 |
| Bell Trust | 4 |
| Community Cat Coalition | -- |
| Elizabeth Ruthruff Wilson Foundation | 4 |
| Friends of the Tecumseh Library | -- |
| Hands of Hope Inc. | -- |
| Herrick Memorial Hospital Auxiliary Inc. | -- |
| Herrick Memorial Hospital Fndn | -- |
| Herrick Memorial Hospital Inc. | -- |
| Herrick Park Parent Teacher Organization | -- |
| Kathleen Ann Nicosia Memorial Foundation | -- |
| Lenawee Community Foundation | -- |
| Little Indian Pre School Center Inc. | -- |
| M B I C Inc. | -- |
| Michigan Mustangs Elite Softball Club | -- |
| National Homeschool Music Ensembles Inc. | -- |
| Orchard Terrace Non - Profit Elderly Housing Corp | -- |
| Parent Communication Network of Tecumseh Inc. | -- |
| Patterson Elementary Parent Teacher Organization | -- |
| Promenade Tecumseh Inc. | -- |
| Redeeming Love Ministries Inc. | -- |
| Restore Hope Inc. | 4 |
| River Raisin Greenways Project Inc. | -- |
| River Raisin Ragtime Revue | -- |
| Spec Community Foundation Inc. | -- |
| Tecumseh Area Historical Society | -- |
| Tecumseh Area Soccer Club | -- |
| Tecumseh Band Booster Inc. | -- |
| Tecumseh Firefighters Foundation | -- |
| Tecumseh Missionary Baptist Church | -- |
| Tecumseh Players Inc. | -- |
| Tecumseh Schools Foundation | -- |
| Tecumseh Youth Theatre | -- |
| William G Thompson Foundation | 4 |
| Womens Ridgeway Cemetery Assn | 6 |