| Name | Deductibility Code |
| Adolph H & Rosetta J Peterson Charity Foundation | 4 |
| Church of Jesus Christ Restoration Branch Ames Iowa | -- |
| Friends of the Slater Public Library | -- |
| Slater Area Historical Association | -- |
| Slater Community Club | -- |
| Slater First Responders Association | -- |
| Time of Refreshing | 4 |
| Womans Christian Temperance Union Benedict Home Endowment Fund | -- |