| Name | Deductibility Code |
| Alert Inc. | -- |
| Animal Resource Center Inc. | 4 |
| Berean Bible Institute Inc. | -- |
| Cedar Springs Church Inc. | -- |
| Dorros-Feuer Foundation Health Science 2 - Lo64 | 4 |
| Fire Museum Network Inc. | -- |
| Friends of the Slinger Library Inc. | -- |
| Honours Inc. | -- |
| National Association of Volunteer Search and Rescue Teams Inc. | -- |
| Penny Pinchers Ltd. | -- |
| Rides and Reins T E C Inc. | -- |
| Scooter Foundation | -- |
| Slinger Area Music Booster Association Inc. | -- |
| Slinger Hoops Ltd. | -- |
| Slinger On-Base Club Ltd. | -- |
| Slinger Soccer Club Inc. | -- |
| Slinger Youth Football Association Inc. | -- |
| Slinger-Allenton Rotary Inc. | -- |
| Venerable Fire Company Inc. | -- |
| Washington County Dive Team Ua | -- |
| Washington County Humane Society Inc. | -- |