| Name | Deductibility Code |
| Apostolic Christian Church Inc. | -- |
| Ariel Foundation | 4 |
| Christian Star Academy Inc. | -- |
| Collegiate Community Ministries Inc. | -- |
| Columbus Computer Society | -- |
| Community Concert Association of Knox County | -- |
| Community Foundation of Mount Vernon and Knox County | -- |
| Dp & S Enterprises Inc. | -- |
| East School Pto | -- |
| Escape Zone | -- |
| Food for the Hungry | -- |
| Free Prayer Box Ministry | -- |
| Friends of the Library of Mount Vernon and Knox County | -- |
| Green Valley Community Christian Association | -- |
| Heritage Centre Association Inc. | -- |
| Hospice of Knox County | -- |
| Interchurch Social Services of Knox County Inc. | -- |
| Knox Community Hospital | -- |
| Knox Community Hospital Foundation | -- |
| Knox County Art League | 4 |
| Knox County Genealogical Society | -- |
| Knox County Historical Society | -- |
| Knox County Horse Park Industry Inc. | -- |
| Knox County Humane Society | -- |
| Knox County Symphony Association | -- |
| Knox County Veterans Advocacy Committee | -- |
| Knox New Hope Industries | -- |
| Knox Performing Arts Coalition Inc. | -- |
| Mental Health America of Knox County | -- |
| Mount Vernon Amateur Radio Club Inc. | -- |
| Mount Vernon Band Booster Club Inc. | -- |
| Mount Vernon High Academic Booster Club | -- |
| Mount Vernon Players | -- |
| Mount Vernon Rotary Foundation | -- |
| Mtvarts Inc. | -- |
| New Directions - the Domestic Abuse Shelter of Knox County | -- |
| Ohio Eastern Star Community Services | -- |
| Ohio Eastern Star Health Care Center Inc. | -- |
| Ohio Eastern Star Home | -- |
| Overcomers Christian Church | -- |
| Owl Creek Conservancy | -- |
| Parents and Friends Volunteer Association of Mount Vernon State | -- |
| Pathways Health and Wellness Inc. | 4 |
| Public Health Partnership of Knox County | -- |
| Rardin Ranch | -- |
| Schnormeier Gardens Foundation | -- |
| The Childrens Connection | -- |
| The Station Break | -- |
| The Veterans Benefit Foundation | -- |
| Tim Hancock Ministries Inc. | -- |
| Twin Oak Parent Teacher Organization | -- |
| United Way of Knox County Ohio Inc. | -- |
| Vineyard Church of Knox County Incorporated | -- |
| Woodward Development Corporation | -- |
| Young Mens Christian Association of Mount Vernon Ohio | -- |