| Name | Deductibility Code |
| Adult Activity Center | -- |
| Beacon Cemetery Association | 6 |
| Carl and Martha Drost Charitable Foundation | 4 |
| Clarence and Lilly Pickett Fund for Quaker Leadership | -- |
| Class of 5-25-77 Scholarship Inc. | -- |
| Communication Research Institute Inc. | 3 |
| Country Life Health Care Inc. | -- |
| Crisis Intervention Services | -- |
| Crookham Family Foundation | 4 |
| Eagle Flight Network Inc. | -- |
| Evangel Mission Outreach Church Inc. | -- |
| Forest Cemetery Association | 6 |
| Friends Development Fund Inc. | -- |
| Friends of the Auditorium | -- |
| Friends of the Oskaloosa Public Library | -- |
| George Daily Charitable Trust | -- |
| Good News Chapel | -- |
| Gps Ministries Inc. | -- |
| Hospice of Mahaska County Endowment Foundation | -- |
| Howard Family Foundation | 4 |
| Human Services Resource Council Inc. | -- |
| Imagine the Possibilities Inc. | -- |
| Iowa Bowfishing Association | -- |
| Iowa Ornithologists Union | -- |
| Iowa Rainbow Foundation Inc. | -- |
| Iowa State Police Association Local 13 | -- |
| Iowa Yearly Meeting of Friends | 1 |
| James and Marie McCurdy Charitable Trust | -- |
| Jubilee Family Church of Oskaloosa Iowa | -- |
| Kaos Gold Wrestling Inc. | -- |
| Kenneth D Allsup Foundation | 4 |
| Keo-Mah Genealogical Society | -- |
| Learning Disabilities Association of Iowa | -- |
| Lifehouse Community Church | -- |
| Little Creations Preschool | -- |
| Love Inc. of Mahaska County | -- |
| Mahaska Community Recreation Foundation Inc. | -- |
| Mahaska County Boys Incorporated | -- |
| Mahaska County Historical Society | -- |
| Mahaska County Hospital Auxiliary | -- |
| Mahaska County Humane Society | -- |
| Mahaska County Outreach Inc. | 5 |
| Mahaska County YMCA | -- |
| Mahaska Futureview Inc. | -- |
| Mahaska Hospice Auxiliary | -- |
| Mahaska Hospital Foundation | -- |
| Mahaska Soccer Club | -- |
| My Fathers House | -- |
| New Hope Community Inc. | -- |
| Oskaloosa Band Boosters Inc. | -- |
| Oskaloosa Band Foundation Inc. | -- |
| Oskaloosa Community Development Foundation | -- |
| Oskaloosa Community Theater Inc. | -- |
| Oskaloosa Education Foundation Incorporated | -- |
| Oskaloosa Elementary Pto | -- |
| Oskaloosa Public Library Foundation Inc. | -- |
| Oskaloosa Society for Christian Instruction | -- |
| Oskaloosa Symphony Association | -- |
| Park Church of Christ | -- |
| Penn Central Model Railroad Inc. | -- |
| Sound in Spirit Broadcasting Inc. | 4 |
| South Central Iowa Independent Living Center Inc. | -- |
| Southern Iowa Fair Foundation | -- |
| The Alumni Association of William Penn College | -- |
| The Mahaska County Sheriffs Mounted Posse Association | -- |
| United Way of Mahaska County | -- |
| William Penn University | -- |
| Young Womens Christian Association | -- |