| Name | Deductibility Code |
| Cadiz Biddy Football Association | -- |
| Cadiz Emergency Medical Services Inc. | -- |
| Cadiz H S Alumni Association Scholarship Fund Inc. | -- |
| Cadiz Volunteer Fire Company | 6 |
| Church of the Living Word | -- |
| Clark Gable Foundation Inc. | -- |
| Harrison Central High School Athletic Association | -- |
| Harrison Coal & Reclamation Historical Park Inc. | -- |
| Harrison Community Hospital Foundation | -- |
| Harrison Community Hospital Inc. | -- |
| Harrison County Council on Aging Inc. | -- |
| Harrison County Genealogical Society Inc. | -- |
| Harrison County Historical Society | -- |
| Harrison Hills City Schools Educational and Alumni Foundation | -- |
| Harrison Hills Cottage Industries Inc. | -- |
| Harrison Industries Incorporated | -- |
| Harrison Youth Soccer League | -- |
| Humane Society of Harrison County Inc. | -- |
| Huskies Football Club | -- |