| Name | Deductibility Code |
| Black Hills Holy Land Church | -- |
| Black Hills Mountain Lion Foundation Inc. | -- |
| Camp Laugh A Lot | -- |
| Christs Family Fellowship | -- |
| Custer Ambulance Service Inc. | 5 |
| Custer Area Arts Council Inc. | -- |
| Custer Area Transportation Services | -- |
| Custer City Fire Department | 6 |
| Custer Community Health Services Inc. | -- |
| Custer County Community Exchange Inc. | -- |
| Custer County Historical Society | -- |
| Custer County Senior Citizens Club | -- |
| Custer County Youth Foundation | -- |
| Custer Food Pantry Inc. | -- |
| Custer Youth House | -- |
| Humane Society of Custer Area Inc. | -- |
| Lakota Animal Care Project | -- |
| Mitchell Woods & Fox Corporation | 4 |
| Tennyson Family Foundation | 4 |
| University Camps Inc. | -- |
| Veterans of Foreign Wars Department of South Dakota Ladies Auxiliary | 1,6 |
| Western 4-H Family and Consumer Sciences Show | -- |
| Women Escaping A Violent Environment Weave | -- |