| Name | Deductibility Code |
| Christian Area Teens Called to Him | -- |
| Sibley Renville Future Agricultural Interests Recognized Inc. | -- |
| Winthrop Community Historical Society | -- |
| Winthrop Community Theatre | -- |
| Winthrop Health Services Corporation | -- |
| Winthrop Honor Guard | 6 |
| Winthrop Library Friends | -- |
| Winthrop Schools Alumni Association | -- |
| Winthrop Senior Center | -- |