| Name | Deductibility Code |
| All American Premier Breeds Administration | -- |
| Booster Club of Castle Rock | -- |
| Castle Rock Alumni Wrestling Foundation | -- |
| Castle Rock Care Coalition | -- |
| Castle Rock Christian Church | -- |
| Castle Rock Family Life Center | -- |
| Castle Rock Lions Club | -- |
| Castle Rock Police Reserves Association | -- |
| Castle Rock Pre-School Parent-Teacher Organization | -- |
| Cowlitz Valley Health Association | -- |
| Drug Abuse Prevention Center | -- |
| Friends of Cloud Mountain | -- |
| Friends of the Castle Rock Library | -- |
| Full Gospel Church of Castle Rock | -- |
| My Fathers House of Prayer | -- |
| North County Recreation Association | -- |
| Parent-Teachers Organization of Castle Rock | -- |
| Swing Kids | -- |